I'm 35 and I've been having this pain in the middle of my chest since last evening. It feels like it's right in my chest cage and it gets worse when I move around. I'm not having any trouble breathing, which is a bit of a relief. Before this, I had some lower back pain, but that kind of went away on its own. And just last week, I had a stomach infection and took antibiotics like augmentin and medications like pantoprazole and meftal Combiflam based on the symptoms. Can you help me figure out what's going on and suggest a treatment? I'm a bit concerned about this chest pain.