Pain under left rib (just left of sternum)

[Jazie543x]

So I've been experiencing as what I can only describe as cramp/spasm, left of my sternum just under my left rib. It comes and goes and only seems to happen when I stretch or move to quickly, it only lasts around 30seconds and then realaxs and is fine. Sometimes now and then it twitches aswel like a throb sensation. It's not painful I'm just aware it's there. Also been experiencing some heartburn/acid now and then aswel. Could this be related?
Has anyone else had this and know what it could be. (Got doc app this week) I suffer with health anxiety so I don't know if I'm thinking about it so much it's making it worse 🤦🏻‍♀️

Thanks

I get that from my gallbladder. A stone just moves somewhere it doesn’t fit and it hurts. It goes away again but the pain is intense. Maybe it’s that? I get it on the right the majority of the time though.