Call The National Council on Aging in your area and they will connect you with a lot of resources to help your mother with different types of assistance. She also qualify for monthly senior discounts for phone, water, electricity, and gas services. Since she receives social security, she qualifies for a free government phone which provides minutes each month. Contact her utility companies and let them know she wants the senior discount.
You should go to your local Department of Family & Children Services office and apply for Medicaid for your child. If you all have low income or your income is within the bracket they use, they will not deny your child. They will also all of your outstanding medical bills as well. I am disabled and went through the same thing. You all should also apply for Social Security Disability for your baby. Hire a Social Security Disability lawyer who offers free consultations and who doesn't collect unless he or she wins your case. Don't give up, they denied me 4 years in a row even after my attorney and I appealed their decision 3 times. While my attorney and I were waiting for a court date, they reviewed my case again and said they didn't want the responsibility of court fees so they approved my disability.
I have found an attorney's office there in your area. You may visit their website at www.mdklaw.net and click on the "Contact Us" tab to see if they have free consultations. Hope this helps.