I had my first child at 18, and was almost in the same situation, my mother and I constantly fought and she wouldn't stop smoking in the house ( not just cigarettes) so I decided to move even though I knew it would hurt her feelings,I got a small one bedroom and kept it a secret from her it was the only way for me to leave without a constant argument until it was moving day. Don't worry about taking ever just take your nasesadies because there is lots of help out there available. Kijiji is amazing, when I did my move I posted something saying first time new mom and dad needing just about everything for our first home on a very fixed income any donations or help would be amazing. Then put an email and you will be surprised how many good ppl r out there.! I think moving would be great for u and your new bundle of joy. And your mom will get over it and u will get the rest of your belongings.
Hope that helps alittle
Congrats on the baby