My period is a 21 day cycle and my last normal period was on Jan 20. I was wondering what the possibility of me being pregnant. I have had frequent urination, fatigue, backache, nausea, and weird sensations in my abdomen. For the past couple of months I have had uti's every month and have unprotected intercourse multiple times a month (the withdrawal method) every time when symptoms are clear. My next period is supposed to be the 15th. What should I do?