I am 22. the first day of my last period was April 10th. I had unprotected sex on the 18th, 19th, 21st, 23rd, and 26th. On the 27th I noticed slight light brown discharge and also on the 28th there was more throughout the day. I have also experienced slight cramping on my left side in my ovary area. Could I be pregnant? Or what do you think this could be?