Masturbation with bleeding question..

I was feeling rather horny tonight so I decided to get out my clitoral sucking vibrator. So it never entered my vagina but I used it and orgasmed and after I was done I noticed some blood on the vibrator. Of course I got scared and began checking myself but didn’t see any more blood anywhere and it was just a little bit on the vibrator. Not feeling any cramps I don’t think and my baby is moving around still. I am 33 weeks. Should I be worried??.. I’m assuming I’m ok but I’m too embarrassed to call the doctor and explain this to check so I’m hoping you guys can help..