My girlfriend is 17 she suffers from urinary tract infection and has irregular periods. When she was 15 she didn't have a periods for approx on year. We made out on her period day 28april, we did not have sex I just fingered. She missed her period then. We did a pregnancy test after one week it came negative then after 10-13 days she had some light brown vaginal bleeding so after another one week we did 4 pregnancy test all were negative. In march she again didn't have her periods. So in june we again did two pregnancy tests both negative. She has no symptoms of pregnancy none. But has urinary tract infection pain! is on homeopathy and allopathy medicines. Can she be pregnant? I am worried cause she didn't get her periods this may!