I believe also that the Gabapentin will help considerably. I'm on Lyrica and it took months for the dosage to get me to the point of relief! You will get there too.

I think it's possible that prior to starting Nortriptyline you really noticed your pain when it was acting up badly. Otherwise you went about your business. Once you were given Nortriptyline you were expecting pain relief. Subconsciously your mind may be checking in on your pain more often, and as a result of that reminder you become aware of your pain more often and more intensely. Just a theory. Ignore it if I'm way off the mark.