Hard time coping...

I'm having a hard time coping with the fact I'm 6w2d pregnant & im 18. I'm very excited, super happy, but I'm not at the same time. I'm scared for mine & the baby's future. I'm afraid I'm going to be a single mom. I barely talk to the dad. He doesn't know yet. We were never exclusive. Back in January I had a miscarriage. It was also his. He just found out about it. I didn't tell him, my ex best friend did out of spite. He's upset and will not talk to me much anymore. Now it's going to be harder to tell him I'm pregnant with this one. This is his 3rd baby now with his 3rd babymama. I don't want to tell him or my mother until the miscarriage risk decreases around 4 months. I just need some emotional support. Please no negative comments.