I had unproctected sex on 4th. Then again, on 17th, I had another unproctected sex. I supposed to have my period on 23rd. But I got my period 2 days earlier which is on 21st. I had a heavy flow on first and second day. But it's not heavy and only had a slight blood on the third day. And on the fourth day, it seems like there is no blood coming out. Plus, I had a fever. My period usually lasts for 4-5 days. Can someone help me with this? I'm afraid that I'll get pregnant because I'm still young.