Not only did I explicitly say to contact the ones not working already but I even specifically mentioned texting them rather than calling. Idk dude, sounds like you just want your manager to hold your hand through everything. I even made sure to qualify my statement by giving an out for being too sick. Obviously if you're feverish, bedridden, and sleeping most of the day that's one thing, but if you "just don't feel good" it's really not that great of an excuse. Maybe we have different definitions of what "sick" means and perhaps that's the entire reason we'll disagree but if you've got a headache and feel kinda tired that's really not an excuse not to go to work, much less not even putting forth any kind of effort.

It could also be the case that you don't work in a friendly store. Whenever someone has to call out we usually find out whether or not the person is able to cover within half an hour. Maybe your coworkers are just jerks that leave you on delivered instead of giving you the common courtesy of saying "no" which causes you more stress about asking them to cover your shift.