Hope you feel better soon!

It does sound like maybe you "strained" something with all the coughing, if you recently had bronchitis.
Otherwsie ,have you changed anything else, like your eating habits? I had terrible pain last year (used to wake me up screaming), and it turned out to be Gall Bladder attacks from eating too much fat (I was on Atkins diet). When I switched to a low-fat diet the problem went away!