Sorry to hear you are having so much pain
I always suggest contacting your Dr. when you are having a 'more than normal' pain episode...and either trying to speak directly with him or see if there is an appt. soon that you can come in and see him.
This way...they can let you know if you are directed to take extra medicine as if you do this on your own for many days...you might run out of medication that they prescribe for the month...or if under contract...a urine test or pill count will be off...
So my answer is yes...absolutely call them and let them know what is going on...if anything...there will be record you letting them know of the escalated pain...
Do you take a nerve pain medicine for the tendonitis? Or any type of muscle relaxer?
Also try to use other methods besides pain medicine to help with your pain..
I am sorry that you are going through this...I hope you can get in touch with them soon..