Orviske you are already a single mom. You are the one supporting your little one to be, not him. Honestly even though I know it is scary to think of going through child birth with out him wouldn't it be great to not have him around for a bit? You could think of it as an opportunity to take a vacation from stress before your baby is born and get the rest you are going to need once the baby is born.
Being a single mom is not all that bad, I know first hand. I love being a single mom to tell you the truth. Yes it is challenging and sometimes frustrating and now she is at an age where it can be scary but I would not trade my experience as a single mom for anything in the world. I have a daughter who is independent, strong and sure of herself and I believe that is because she was raised by a single mom. You'll be ok, you will actually be amazed how powerful you really are. Peace lil'mama!