Holy crap was this an ordeal!
I took her to the vet yesterday because she still wasn't really interested in her food-- and I tried EVERYTHING! On March 21 she weighed in at a staggering 4.1 lbs and yesterday she was down to 3.5lbs. After sitting alone in the tiny exam room for over an hour (but I could her everyone ooing and ahing over her in the lab room). My vet came in and went right into cost estimates and blood work estimates-- which was incredibly overwhelming. They wanted to keep her over night which would have costed around $350. My other option was to give her a hydration shot(which I didn't really get since she's drinking water just fine) and an apetite stimulant. I took that option since the humane society told me they wouldn't really do anything I couldn't do on my own.
She's eating now, but she's a diva and only wants the tuna I was "coaxing" her to eat earlier. She doesn't want normal catfood, but I'll figure out how to get her to like it eventually since tuna isn't exactly healthly or cheap.
She's finally sneezing everything out of her nose and last night I even had to search to find her when I came home(wasn't an issue before since I could hear her breathing and knew where she was always). She's also fit enough to prance about and explore now since she's finding all the dark hiding places in my apartment.
So anyways.. she's not 100%, but she's getting there.