Long story short I’ve noticed this pulling pain that’s on my left side between my armpit and my breast. No visible lumps that I can see, no redness or swelling. I can feel the pain when I raise my arm and I can really feel it when I touch it (I know just don’t touch right lol). But seriously, is it just a muscle strain or could it be something more serious? And I know that most of y’all aren’t medical professionals and can’t tell me what’s going on but maybe somebody has been in this situation before?

TIA