“How to manage left arm pain?”

I started experiencing pain in my left arm about a month ago. I weight lift 5-6 days a week. When I first experienced pain it was when I was working out my bicep and back. Specifically when I did bicep curls is when I noticed an odd shooting pain in my arm. I bounced back between the ideas of what I could have done, I was not sure if I felt pain more in my tricep/ bicep/ shoulder. A week and a half later I felt no pain, so I went back into my usual workout routine. I did chest and triceps and experienced no pain even when lifting heavy, I just felt a bit weaker. A couple of days later I went to do back and biceps. I did two variations of lat pull down, and felt no pain. However I went to do bicep curls with a bit lighter weight, and after one set the pain came back and even felt worse. This was on September 4th, today is September 20th. I have felt a decrease in pain, however, I still feel slight shooting pains. I have been taking Advil every day, and at the beginning of September, I iced my bicep. I am not sure where to go from here, I am writing to ask for advice and if there are any stretches I can do to speed up my recovery process.