My bf and i had protected sex few days. He put on the condom perfectly righr and it did not slip off and as he came, i just immediately got off of him and i could also see his ejaculation go onto the condom and is wasnt leaking. 3 hours later i went to the bathroom and on my underwear i has a white milky substance. Could it possibly his?
That is most likely your own vaginal secretions from sex which were whipped up during all the action just like whipping up egg whites. It's normal and common.