I have definitely experienced pain in my chest that was actually from my rib being slightly out of place ( ON my back not my front). This is very normal and not dangerous. It started because I had a tight shoulder muscle from sitting at a desk and typing. There are so many non - dangerous reasons chest pain can arise! However if it is bothering you and weighing on your mind you could always visit a GP. A decent chiropractor would also be able to tell you if it is a sprain - this kind of sprain is very common. It's likely that it is something like that so in the meantime try not to stress too much! good luck!
I also have Gerd. You may be having esophageal spasms. I have them from time to time, and the chest pain is crippling. It comes and goes and can last a long time. I thought it was a heart attack the first time. I can feel the pain all the way through to my back. I got a prescription for Donnatol (Belladonna and phenobarbital) and it works like a charm. There is no test for the spasms, they just ruled out everything else. Ask your doctor to consider this. The reflux irritates your esophagus, which begins to spasm, causing the pain. If that is it, it is a simple fix.
Seriously, I'm not at all trying to be mean, but this question has been asked and answered so many times already. Your main problem is your thinking, and until you solve that problem, preferably through therapy, you're going to make yourself a wreck and yes, that will have impact on your neurological response to the normal tweaks of life. Truly, tell me what feels worse -- the level of pain you're feeling or the amount of worrying you're doing over it?