Ex not stepping up

Just found out I am pregnant. Uncertain of how he would react I told my ex. He is not at all happy and is saying I've tried to trap him and that it's not his baby and I've lied about being on the pill (didn't lie, I was taking it I'm just not very good at remembering to take it every single day) and now he's blocked me off everything and will not speak to me. What can I do? :(