I had sex about three months ago. Sometime at the end of October or in the beginning of November. It was unprotected sex and I had my period later that week. I haven't had my period since. The thing is, is that I've always been irregular. I only get it about 3-5 times a year and have a 3-5 month gap. I noticed a couple days ago that I had brown discharge when I wiped, but nothing in the toilet or in my undergarment. I've had a bit of the brown discharge since. I don't know if it is old blood from my last period 3 months ago, or maybe I'm pregnant. I've also had some discomfort in my stomach. Although, it could be due to not eating 3 meals a day like I usually do. (Not much food in the fridge). Maybe I'm hungry. It's hard to tell if it's from hunger or just cramps. I've also been thirsty. Could I be pregnant? What do my symptoms suggest?