3 diff BC pills in months, period lasting 2 wks + worried

So I started out birth control on YAZ when I was 16 to regulate my period as I was diagnosed with PCOS. I took that up until the generic gianvi came out this past summer, which my pharmacy switched me to as I couldn't afford to take yaz anymore. I was going crazy on gianvi causing all kinds of issues for me, including an absent period.. so I called up my doc and she said that nobody really likes it.. she switched me to microestrogen which I took for a little over 3 months.. it drove my body crazy bad cramps absolutely NO PERIOD AT ALL.. i took like 3 pregnancy tests and a blood test all of which were negative but the pains, the cramps, the mood swings and the crazy hair growth were too much for me. I recently ent back told her my problems and she put me on BeYaz which is just yaz with folic acid.. I thought I'd be great on it since Yaz helped me before but now I am not so sure.. I started taking it and havent missed a pill.. I took the first pack and when I got to the dummy pills my period didnt start and I started the new pack that sunday and my period came on tuesday.. lasted a few days then stopped.. next day all of the sudden it returned and since Jan 15th to now, I have been bleeding every day. I am not sure if its because the fluctuation in low estrogen, to high estrogen, back to low estrogen or just the fact I havent had a period for 3 Months but I am worried and it is hurting my sex life.. has anyone any advice or has this happened to anyone else before? I plan to call my doctor but can't afford to go see her right now..