Bleeding after sex

I’m concerned about me bleeding after sex. We used protection , when I got home to use the bathroom I saw light spotting. I’m extremely worried I googled what it could be and I’m not liking what I’m seeing. I just my period this week it ended like 2-3 days ago, I’m not sure if it’s left over blood or cause of the sex, if Anyone has any advice or info , I’d appreciate it.