Period or not?


Hey guys need some help!

So this is really really recent, I was having some alone time with my SO and we ended up having sex but when we turned the lights on there was red stuff that looked like period blood on the sheets and on my panties. Is it period blood? Should I be worried? Is it spotting? Idk if it is bc it’s my first time. My period finished last week hence why I was so confused (my SO even more 😂)