Single, Pregnant SAHM with an active 4 year old

Any second time moms have advice on how to handle the day to day of taking care of a preschooler who is not in daycare while being in daily pain and fatigue 31 weeks pregnant.

I stay with my parents since the father left before I even knew I was pregnant. But my parents work almost daily so I have to fend for myself with my daughter and symptoms.

My friends are either busy, far away or create more work for me than help.

I know it can be done to manage but I am at a loss of solutions. Hoping to have some ideas from the community.