UTI's !!!

I believe this is my second time that I've gotten a uti but I'm 16 almost 17. I got the symptoms last week and I drank some uti pills that were otc medicine and it didn't work. then I drank cranberry juice and when I peed it wouldn't hurt. so then I thought my uti went away. Now I am starting feel the burning sensation after I pee but it is that bad. I noticed that the lips of my vajayjay got like swollen..Also, to included that I am close to starting my period soon. HELP ME ! WHAT SHOULD I DO?