((((so confused)))))
It sounds like you're going through a really tough time right now. The postpartum period is a very difficult time, especially if you have little support and have to go back to work. On top of that, you're also adjusting to a change in your belief system, and are feeling pressure from your family to go back to their religion.
That is wonderful you have an appointment with a therapist coming up in a few weeks. If you feel like you need to talk to someone before then, please seek help or talk to your doctor.
Last year I left the religion and was pregnant shortly after. It was a difficult adjustment and put a huge strain on our marriage. I have found therapy has been really helpful, and also talked to my doctor about postpartum depression and have help for that.
I suffed from anxiety postpartum, and was afraid of any knock on the door in case it was a witness. Please don't feel like you're overreacting, you may just be suffering from anxiety. Perhaps you could kindly tell your relatives that you are suffering from PPD and don't want to discuss religion right now.
I sent you a PM. Take care!