I've had many scopes while on my period due to the fact that I have a uterine polyp. Basically b/c of the polyp I bleed all month long so there is no "good time" to schedule around my period. I never know when and how long I'm going to get it. My doc tells me just to wear a tampon and I have if I'm bleeding heavily. If i'm not I just wear a pad. Trust me they've seen worse things....I don't think he/she would be bothered by you having your period. Besides, he's going to be focusing on the other end