Is it normal for your vagina to get hyper-sensitive during menstruation

So, I have noticed that during my menstruation cycle that my vagina gets hyper-sensitive. My boyfriend doesn't like the idea of period sex (which I'm fine with) so I did an experiment. After my shower this morning I masturbated and brought myself to the most intense orgasm I have ever given myself. Is this normal? It felt better than usual during the actual act and the "big finish" was crazy. Is this normal?