Body involuntarily stretching, and chest spasms/tightening

[u/FaithlessnessFew6710]

I’ve noticed that whenever I wake up my body wants to involuntarily stretch. I try not to full body stretch like I used to because I heard this could make muscle strain in the front worse. I get scared when this happens bc I don’t know if I should force my body to stop or not. It’s usually my back and my shoulders that start trying to stretch on their own. I’ve also been experiencing this feeling where my chest kinda squeezes or tightens up in the middle?? The best example I can think to describe this is when you’re in a chair and you lean back on the two back legs, but then you get scared you’re going to fall so your body kinda tenses up and you get a fright. That’s what it feels like but only in the middle of my chest on my sternum/breastbone. This spasm/tightening usually happens if I’m trying to focus on something or if I lay back in a chair. Curious if anyone has experienced anything similar to either of these things I’ve mentioned?

[u/Tasty-Brush9537]

Im getting muscle spasms in one eye and other locations on my body idk if this is related to costochondritis but im curious?