Cum during Period?

I know I shouldn't be worried but I've been on my pill for 7 months now, I take it everyday at 6pm I've never missed one or been incredibly late and it religiously finishes on a Thursday, I get my bleed Sunday and then I start my pill on the friday.

Yesterday however (Wednesday) my boyfriend and I tried anal sex while on my period. He was wearing a condom but it broke and he came inside me. His cum was dripped down to my vagina and now i'm extremely worried. Could anyone reassure me it's okay