I agree, I was diagnosed 2 years ago. It took me going to a walk in clinic to see a doctor who didn't even know me to get to the bottom of it. I have to take extra "water" pills to keep the diastolic low. Don't wait. Get going to the doc today.
Ditto on woodruff's comments.
Those are pretty high pressures, considering that you are taking medication. Call your doctor tomorrow, tell him/her what your numbers are, and that you are worried because your pressures remain high. If the doc does not ask you to come in, ask for an appointment to discuss a different medication. I tried five, I think, before we found one that worked for me.