Massive i couldn't read and not post.
Your an amazing mum, your on a community like BB, your reaching our for some help and thats what matters.
I agree with the others that it might be good to go and see someone, even if it is your local GP, bubs could def have reflux or colic etc, does she take a dummy?
My DD wouldn't (still wont) and i have seriously felt at times like i could throw her through a wall, she would cry for no reason, feed constantly and i couldn't leave a room or put her on the floor.
Only recently have i noticed a change in her and that was when she has started solids, i don't know if it's helped settle her stomach or maybe she was hungry?
Have you tried supplementing 1 feed a day with formula, i haven't myself but i know someone people say it works for them when they have a bub that feeds a lot?

GL with it all, i hope someone has just the right advice for you!