Pelvic pain vs Caffeine and coffee

So I think I'm noticing a correlation between my pelvic pain and the consumption of coffee.

I have been experiencing pelvic pain on and off for almost a year. The past 2 or three months it has been an everyday accurance. Also within those three months I have switched to decafe. There was one or two days that I ran out of decafe. And I noticed the absence of the deep aches. So I wanted to experiment to see if the two might be connected. So I cut out the decafe and it has been almost been 48 hours and no deep aches. There has been random discomfort, but nothing compared to what I was had been experiencing.

So has anyone else experienced anything similar. Or have any idea of why ?