I'm 52 yr old female with high blood pressure and asthma. About ...

I'm 52 yr old female with high blood pressure and asthma. About 4weeks ago had bronchitis with massive doses of prednisone. Around the end of the prednisone my doctor switched me from enalapril to lisinopril to better control my BP. Well after the Prednisone my knees felt better than they've felt in 3 years NO pain. I 1st started noticing the leg cramps when in bed at night. Now the cramps are 3 to 4 times a night waking me up. 3-4 days ago my knees started hurting again, to the point I have to brace my (R) knee even at rest. I can barely walk. So I decided to look at my medications as a source of my pain. Calling my MD on Monday. Switching back to Enalapril until then