Ok, so I lost my virginity 3 days ago, and I'm pretty sure I'm not pregnant..now here's where I'm worried. My period is supposed to come on march 7th. This morning, when I urinated blood came out as if it were a normal period. A few hours later I went to check..the pad was full of dried blood, but when I wiped, no blood came out. And then a few hours after that I checked again, and still no blood. I asked my friend's mom who's worked at a hospital and she said it was my cycle changing cause of seasons. Fetuses don't form in 3 days, so it couldn't have been a misscarrige, right? And based on what I've just said, is there a chance I could be pregnant? ( I used a condom, btw)