Young with bad shoulder pain

Patient: For the last 3-4 weeks ive been having bad shoulder pain its just constantly there on both sides. It hurts when I lift my arms for too long. Im 21. I also have chronic back pain and scoliosis. My current clinic said it will be weeks to months before I see the doctor im on the waiting list. It just hurts so much and I find myself constantly rubbing my shoulders all day to try to ease the pain. I dont know if I should go to urgent care or just wait?