WHATS GOING ON WITH ME?! pregnant? or what..?

okay so im 17 and idk whats going on with me....i havent got my period in well over a month! and 3 weeks ago i got some kind of brownish stuff that i thought was the comming of my period but no it lasted about 2-3 days and it wasnt soooo much but i used a pad but it was literally brown noo blood then i pee every minute and when i work out sometimes i pee in my pants alot! i mean i always eat alot but latley i just have cravings and i cant stop the last time i got my period i believe was may 12th? or earlier like 10th i forget but yes i have a boyfriend and we have sex but he always uses a condom but idk if it broke or something happened bc most of the time hes drunk