I had my first UTI about 3 weeks ago. And the symptoms are coming back. They started coming the third day of my period. Me and my boyfriend are sexually active but, there s no chance for std s because we were both abstinent previous to the relationship. I didnt take the last day of my UTI antibiotics , i use birth control(Tri-Sprentec), i use vagisil soap, i havent been drinking a lot of water recently, and my diet is messed up. So it could be a mix of a couple things. Will my doctor freak out if i go back so soon? I just want the antibiotics. Nothing more. Any help on how to avoid another UTI?