Help!!! Possible yeast infection ?:/

Itzel • In love with the most amazing man, Expecting our first baby in Oct <3
Ladies I need help asap... please!! I'm desperate... I've had an "infection" ever since August of 2014 .. symptoms: pain when I urinate, lots of nasty (sometimes cheesy like ) discharge, smells kind of weird not necessarily fishy but nasty, itchy that's for sure, I do wanna say swollen down there.. and pain in my abdomen sometimes unbearable.. so I've been three (too many times) to the doctor and they all tell me it's a yeast infection give me medicine (all "different" kinds ) and it just won't go away!! I am desperate y'all I need answers it's been a long time.. I know it's not an std cause I didn't have sex and I haven't had sex since 2013!!! I don't have money to keep going to the doctor .. anyone? Please...(learn more on Glow: https://glowing.com)