I agree I'd ride more and see if things still feel strange. Are you riding more aggressively? Maybe getting into the drops more than you used to?
It's possible your seat moved, maybe lowered a bit? Maybe you should check that it's not loose and that it's in the right position (if you have a way of figuring that out). My husband, who rides tons of miles, realized after a few rides where he was experiencing pain and not riding his best, that his seat had lowered. He did at least one 100 mile ride that way. The next time he rode, with seat properly adjusted, he was like a new rider.