Hi, I'm not the medical expert they are contacting, but blood pressure can be tricky to get under control at first. One question I have is whether they have checked out your kidney function. Kidney problems often cause hypertension. There are many meds that can help with blood pressure, so if the ones they have put you on are making you feel crummy, they can try something else in most cases.
Honestly, you may want to get a second opinion. It is always appropriate when you have something big going on, especially if you aren't getting any relief. Mayo has a nice information section that may help you: http://www.mayoclinic.com/health/high-blood-pressure/DS00100/DSECTION=causes.