For the past 4 or 5 days when I go to the toilet it really hurts when I pee. It doesn't hurt when starting off normally but only hurts when it gets near the end. It stings just as i'm about to stop. Last night I was awake from about 4 till 5.30 coz my bowels felt like i wanted to pee but i didnt. I know this is not normal but what is it?I'm 21 years old and 7 weeks ago I had a stroke, I came out of hospital Friday week ago. They put me on medication to thin my blood and was wondering if maybe its a side affect of that.