Heartbroken

My husband just told me last night that he cheated on me about three months ago problem is im two months pregnant. He says it was an accident and that it only happened once. I cant stop crying everytime i look at him i get angry, but i dont want him to go. I feel like i pushed him into it.i was so occupied with work i didnt care what he was going threw. I dont want him to stay just for the baby. Im trying hard not to lose this baby. Idk if i can handle another miscarriage. What should i do?