Would you be scared to have sex with your partner of he already gave you two stds

Im pregnant by him and he wants me to get back with him and he wants to have sex but i dont trust him especially after he gave me chlamydia and Trich that i was treated for at separate times and now he wants me to just hop in a relationship and have sex with him he was the first person i gave my body too and now the father to my unborn baby so the point im at now is being fully done with him but he doesn’t want that he says he love me and miss me and thats the past but its hard for me to let something like that go. We are not together right now but he want to be .