I have a crown and it causing me great pain. What should I do?

So I had a crown placed on my teeth about a month ago and I still have major sensitivity and pain. My dentist said if I do Invisalign that will help with the problem. I listened to him and I am in treatment for Invisalign right now. My crown still hurts I have major sensitivity when I eat fruits, brush my teeth, and I have problem sleeping. I informed my dentist and he said it's the bite but I know it is not. What do I do? I am stressed out and I cannot continue to go through the day like this.