So recently for the last week my left arm has been getting sore. I noticed it has been getting sore because I would lift something. If I dont lift anything it doesnt hurt. But the second I do it hurts like shit for an hour or longer. It seems like its in the middle of my left arm bicep. Also it seems like in my top part of my forearm. Is that really what it is? I can do daily tasks fine but when I put any sort of strength into it it hurts. Like moving something over 20 pounds.