Is it an endo thing to have cramps and spotting (old and fresh blood) after arousal?

Okay so I'm in the middle of finding out whether I have endo or not.

I've had the initial exam and ultrasound and I've been offered a diagnostic laparoscopy which they gave me 6 months to make a decision on (I'm calling up soon to say yes to it) but today I got aroused and not long after I got cramps like normal what I call just "endo pain" but I've also just noticed I've been spotting which I'm not experiencing on a regular basis.

I just wasn't sure if that was almost normal or can be normal for someone with endo or if I should be more worried.