5 sores on my belly, 1 scab in scalp. Scabbed over, puckered & red ring around them. 2 others left scars. Mom diagnosis w/ mrsa. I visited. Could I have it?

Possible infection. Based on your description, the rash sounds like an infection. However, can't be sure without examining the rash. Best to see your doctor for a definitive answer and treatment plan.
Not likely but c MD. It doesn't sound like it but this is not a definitive diagnosis and you should really see an md to make that judgement.