Yesterday night me and my boyfriend had unprotected sex for a few seconds. He was thrusting really hard. He told me he didn't cum and I know he didn't since we only did it for a couple seconds. But I'm scared I might be pregnant from his pre cum. He urinated about 2 earlier before we did it. I was a little wet after we finished. Today as I was wiping after I urinated it looked like I had sort of brownish kinda pinkish color discharge. Am I pregnant? Please help.