It's late I'll call the doc tomorrrow but I was wanting to know if anyone has heard of or has experienced this. My left arm just kinda aches a little like it needs to be stretched. I'm 35 weeks other wise no issues. I've noticed it usually occurs after I've been active (lots of walking). No headache, no spotting, no cramping, just a achey upper left arm. At first I thought heart attack then I did some Google research and wasn't able to reach a conclusion. Any ideas as to what it may me. Btw I do sleep on my left side but when I wake its not a problem only after walking for a long time.