What was the reason your first cap came off ?
Did you ask your second doctor ?
We need to analyse why it failed first time...
Did you go back to your last dentist and describe your current pain ?
What did he tell ?
If you have not visited him, why have you not visited ?
Next Steps
first visit your old dentist and listen to what he will tell..
Definitely something is not correct..
needs investigation
Health Tips
brush twice a day and keep good oral hygiene