Soft cup sex!

Celeste
So I want to have sex but I'm on my period and I don't want any blood leakage. I was wondering if any of you ladies know anything they can stop blood leakage while having sex on your period!?
 I heard of this one thing called soft cup and I did some research, I was wondering if anyone has used it while having sex on there period?
And if so, was there any leakage