Caught partner cheating yesterday. I’m 37w2

Caught partner cheating yesterday. I’m 37w2d pregnant. Our son just turned 3. He hasn’t touched me affectionately or at all in months. He wouldn’t let me touch him either. Always a reason to avoid it. How am I supposed to prepare my mind for natural childbirth with this weighing me down. We just moved out here. No family around. I’m not close to any of my family anyway. I don’t have a single friend I could talk to. Or anyone. I’m so alone. I’m so crushed.