Giving birth alone

I’m 38w2d and just sent my husband to rehab. He has been an addict in and out of active addiction since we have been together, 7 years ago. We have a two year old little boy, who he is an amazing daddy to, so I have hope that rehab will bring his mind some peace. If this saves his life, it will be worth it, but I’m just so scared to do it alone. I keep thinking about how great our reunion will be, with a baby girl and a daddy who can think clearly again, and it makes this next month of loneliness feel worth it. Did any other mommas give birth alone? How did you get through it?