Personally, I'd probably try laying off the caffeine for a day or two to see how you respond, unless the tightness is more than just a minor annoyance. Like mooch said, you don't wanna mess around with it. I'm coming off a 4 wk cycle of hdrol tomorrow, and I've noticed an increase in my heart rate lately. I was planning on a 5 wk cycle, but sleep problems and now an increased heart rate are why I'm cutting it short. Read enough threads around here, and you'll see that reactions to these compounds can be so individualized that it really only matters how you yourself is reacting to it. If you've made adjustments to your cycle - dosing, supps, diet, etc - and something still doesn't seem right, that's a pretty good sign you should probably stop.
It does kinda suck, but that's the nature of the beast. Keep us posted on how things turn out, and good luck to you.
