HI, I Am A 35 Year Old Female In Good

HI, I am a 35 year old female in good health. About 3 weeks ago I started feeling pain in my upper left abdomen, right under my ribs. I thought I pulled an oblique from exercise, although I don't recall any type of pain/injury during moderate exercise (oblique burner, crunches 30 per day each). It has not gotten better
(halted those exercises) and today I experienced severe pain upon coughing, felt a pop, and have minor pain in my upper back adjacent to the upper abdominal pain. It now hurts to breathe or cough, hurts upon twisting, bending, No fever, but I have had fatigue/sleeping more and generally feel off. I've experience headaches I do not normally have as well for approx 2 weeks. I don't drink or do drugs and have a high tolerance for pain, but this is pretty painful. I'm unsure whether to see an urgent care, or just let a sprained muscle heal.