Greetings OP,
Your question is a slightly complex to answer but I will do my best. I will give you the TL;DR version first and then I will go into details and an extended explanation. Do you believe in yourself and are you having fun when you move forward? The other thing is that our condition regardless of what others tell us is a skill and a tactical advantage. Below I go into detail of what has helped me overcome the mental block that you speak about so read ahead but let me give you one other quick bit of information. Even if others give you all that you say take it with grace and act on it. If you need help and you think you will be interested I am part of a Leadership Group that focuses on empowering others. I have been a Peer mentor for many years and I have gone through what you are feeling.

What do I mean by believe in yourself? I understand the feeling of having been handed something by others due to the condition that one has. In my case I am almost totally blind at this point in my life. I struggled with the feeling you described as I was finishing my BS in Sociology a couple of years ago. The truth of the matter is that I was doing extraordinary things that from my point of view were common things and nothing special.

Yet, to those who are experiencing my story and who attempt to put themselves in the role of myself the actions I was taking were incredible to them. Let us distill it even further. The crux of the feeling is by what rule set we choose to judge our actions by. When we imply that something was given to us due to our condition we are using the rule set of someone that does not have any limitations.

When we reframe the point of view and use a differentangle lets say would someone else who suddenly acquired your condition be willing to go to the extreme and do what you have done regardless of outcome? This reframing sets you up for a new mindset. You are not the victim role in the question but the survivor role.

To many times we get hung up on the what if it was given to me because they feel sorry for my condition. The truth of the matter is they may feel sorry but that does not matter a single bit. Did you do all you could and be happy with who you are. If I was someone that used to be in a perfect physical condition and became how I am now a disabled and blind person can I be happy with who I am.

The answer for me was NO I was not happy with who I was but I learned to enjoy myself. I believe that when it comes to confidence in oneself we have five aspects that need to be in harmony in order for us to overcome the challange that your question asks.

The five aspects are Physical Outlook, Mental Outlook, Spiritual Outlook, Instinctive Understanding, and Logic/Analytics. This five core concepts when they are in balance we start to understand that no one gives us anything for free.

Balance in your Physical Outlook comes from our understanding of what limitations our body has and us accepting the limitations we have been given.

Balance in your Mental Outlook comes from and understanding of our mind and the factors that influence us the most. In my case although I am almost blind I enjoy reading print, painting scale miniatures, and playing computer games.

Balance of your Spiritual Outlook translates into having faith in something. This does not mean faith in God or a Divine being although it can help with this aspect. Faith is being able to belief that something you can not quantify or apply reason can happen even if no evidence exists to prove its outcome.

When I talk of Instinctive Understanding I mean do you listen to that feeling you get when you stop thinking and just take action. When you have balance with your intuitive self and your active self something interesting happens. You start to understand the world around you from a unique perspective that not many normal individuals get to experience.

Finally a balance of Logic/Analytics is as simple as do you trust the facts of what you have seen at face value and do they make sense to you. If you can reach a clear state of mind while looking at the reality you have in front of you you have most likely reached balance in this area.

When we combine all this factors and reach a balance between them we come out with one interesting point of view. No matter the external conditions or internal conditions we show that we are incredible individuals and nothing was given to us. We paid for each thing with hard work and dedication by believing in ourselves. Others see this and support us because we all like a story of someone struggling and overcoming adversity.