Can blood be normal during sexy time?

Me and my boyfriend had sex a few days ago and ever since then my legs have been sore so I’ve been down cause I can’t do lots of walking.

He surprised me today with coffee and then one thing lead to another and he was eating me out for at LEAST 40 minutes. Then he fingered me a little and when he pulled his fingers out there was a little bit of blood and he got concerned. I wasn’t hurting at all.

Could that be from becoming sexually active after a 7 month dry spell?