Constant Desert :(

I need help, ASAP. My boyfriend and I are very sexually active and it's been since this time October that I've just gone dry. Around that same time I got my birth control shot and I can't get wet no matter what :(. And believe me, it was never an issue till now. I've tried UTI and yeast infection medications but neither of them helped. Im only 17, so there really shouldn't be an issue. Another addition is I have been having many I grow hairs after I shave and it smells foul down there. Nothing's really changed about my diet, I haven't been working out as much as I use to.  Someone help :(( I'm in dire straits right now ladies..