Left arm pain aches/discomforts?

For the past week I’ve been having aches and discomforts in my upper left arm and under my left chest area. I have had these before but not I believe not as long. I want to know if anyone has any idea to what it could be? I have my cardiologist appointment Tuesday so I can see if it’s heart related or not. But most... show more For the past week I’ve been having aches and discomforts in my upper left arm and under my left chest area. I have had these before but not I believe not as long. I want to know if anyone has any idea to what it could be? I have my cardiologist appointment Tuesday so I can see if it’s heart related or not. But most likely he will tell me no since i have had a nuclear stress test done before. But my recovery heart rate when I work out is fine, my blood pressure is good, my resting heart rate is great. when I work out nothing hurts. So I’m just seeing what else it could possibly be. Maybe a sprain or nerve damage or anything? I’m 29 so trying to figure out what’s up. Thanks you all :)
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