I am a woman in her early 60's. I have slightly elevated BP abd ...

I am a woman in her early 60's. I have slightly elevated BP abd it does tend to spike first thing in the morning, after waking and is much lower (normal) at night. I have tried several different BP meds and had side effects of all of them. The Doctor recently put me on Toprol XL 25mg. After about three weeks, I really did not feel well - extreme fatigue, severe leg and joint pain, depression. I just could not function. I know I am extremely sensitive to medication. I decided to come off the Toprol, after only three weeks and go back to Lisinopril 2.5MG. Now, after only two days of not taking Toprol, I truly feel very weird. Far less tired, but extreme dizziness and a kind of spaced out feeling. Is this just the withdrawal from Toprol...and after only three weeks of taking it? Plus, my BP seems to be very low - the lowest I have ever recorded it. 112/55 last night. Does coming off Toprol actually have a reverse effect and plummit your BP until it is out of your system. If so, why has my doctor told me to triple upon the Lisinopril now I am back on that. Dealing with even slightly elevated BP has become such a major issue for me.