Thank you for your question and welcome to Just Answer.
If you can not get this constant sensitvity to go away using the root de-sensitizing medications, you can always have a root canal done on the tooth and be rid of the pain for good. Although technically the nerve is not dead it is extremely inflamed and eventuially will progress to situation that will need a root canal if you can not get the sensitivity to go away. There is nothing wrong with doing a pre-emptive root canal at this stage in the game and not have to put with the discomfort and headaches for several more weeks, when you will have to have a root canal. Your dentist needs to think a bit out of the box on this one and be comfortable starting a root canal now and put the patient's needs before the protocols in the textbooks.
I hope you find this information helpful. If you have any concerns regarding this issue that I have not addressed, please let me know and I will get back to you with more information.
George McKee DDS
THANK YOU VERY MUCH. I WILL VISIT MY DENTIST AGAIN AND EXPLAIN THE SATUATION. I DID NOT KNOW THAT THERE IS A MEDICATION FOR THIS PROBLEM. CAN IT BE BOUGHT OVER THE COUNTER, OR I NEED A PRISCRIPTION FROM THE DENTIST.THE PAIN ALWAYS GETS WORST WHEN I DRINK ENERGY DRINK.THANKS AGAIN.