Ahh, sweetie, I'm sorry. It sounds hard. I understand. It's a huge undertaking to have a baby and especially by yourself. Do you have another as well that you care for on your own? You have to do what is very best for YOU. No one walks in your shoes or will be up in the middle of the night with a newborn but you. So, this is about you and what you can handle. No judgement or guilt here!
Have you spoken to the baby's dad yet? Do you have any supportive family in your life? Let me know how you are doing!