Bodily Issues

Ok so I had sex once while my period was on, but it wasn’t really sex. I just wanted to see what it was like, so I just sat on it and bounced up and down a few times. He didn’t cum or pre-cum. 2 weeks later, almost 3, I have a fever and haven’t been able to eat for a little over a week. I googled it, and flu came up. However, yesterday, I was spotting. Should I be worried. My period comes on in 12 days, but i’ve never experienced spotting.