Question please answer?

Sylvia • Pregnant with baby number 3 🤰🏾💋❤️👶🏼 Evacuation start March 31 ☺️

Me and my SO did the do tonight and I just went to the bathroom and when I wiped it was a little blood on the tissue... do you think it could be from just doing the do or you think I need to go get checked? I’m 33 weeks and 3 days