Sorry to post in chat, just looking for quick replies. 2 days ago I developed muscular pain in my stomach. Exactly like pulled muscles after doing sit ups but I couldn't think of a cause. It's eased a bit now but I've woken up with chest pains, inbetween my breasts, slightly to the left. It's a dull ache coming in waves. Negative covid test, I'm 38 and generally healthy. Any ideas please?