last night someting around 2 am i had sex with my husband  and later something around 4:30 i have masturbated and after that i saw red discharge on my fingers and now in the evening there is still some redness in my white discharge which can be seen after urination .

I am 30 weeks pregnant
and my tummy is also very tight not after the sex but after the masturbation and there is also little pain in the middle of my tummy
what to do now
please doctors and mommys help me this is my first baby and i am very tense about this situation
because this is the first time i masturbated in my whole pregnancy and this is also the first time i got redness