Old fingers, new calluses?

After a long break from playing guitar, I've reformed some nice calluses on my finger tips. My finger tips actually are clicking on the keyboard like a chick's long nails! The problem is, my fretting is getting sloppier as I have lost considerable sensitivity and I can't feel the strings anymore under those tough calluses. Should I restring with heavier strings, or is this just something to work through and get used to again? I play light to ultra-light strings, always have. I play mostly clic rock and blues and do a lot of whole step bends so I don't want to restring if I will have to learn how to bend notes all over again. I also don't want to lose the ability to make whole step bends if heavier strings won't allow it without breaking.