Floaters and flashes of light are usually associated with retinal detachment, not glaucoma. Glaucoma is asymptomatic in most cases and you'll only know you have it once it starts causing irreversible damage to your optic nerve. The exception is angle closure glaucoma which causes pain and may cause blindness within just two days.
My biggest mistake, and one of the reasons I ended up going blind, was trusting my physicians too much and not seeking a second opinion before it was too late.
While I said that optic nerve damage is irreversible there is currently a drug called Cenegermin undergoing
$1 that may reverse some of the damage caused by glaucoma.