I had sex a week ago unprotected after 11 years. About 10 hours later I took the Plan B pill. My period or spotting started taking place about 4 days ago. I'm not sure if it's a side effect of the pill or if it's really my period that's about to arrive. (My period is scheduled to arrive on July 20th or 21st.) Then about 2 days ago, I started feeling a slight tingling around my urethra. So far this is the only area I've felt the tingling; nothing in my vagina. Do you have any idea what the problem may be, if any at all?