Have had lower- mid back pain month+, pain is from tight muscles. would skating injure my back more/ increase pain? wait 2 skate until healed?

It depends.: What you describe may be coming from your muscles as in a "pulled muscle" or may be coming from another part of your body such as your spine. Generally a muscle strain or sprain will resolve up to four to six weeks and rest, gentle stretches along with ice or heat, and over the counter antiinflammatory medications (if not contraindicated) may be helpful. After that time get a medical evaluation