Allegra d 12 hour symptoms and conditions

33yr. old/male 5'8", 170lbs.
I just switched from taking Lisinopril 10mg for 2 weeks to get rid of memory loss issue, dizziness, lethargy, etc. Now I'm on 25mg of HCTZ and I'm having worse issues with the dizziness, tired, lethargic, dumb, drunk, dopey feeling that won't quit. The only other med that I take is Allegra-D 12 hour once a day for the last two years. I saw that high blood pressure was a possible side effect of the Allegra, but my doctor said he was pretty sure that wasn't it since my cholesterol was also high (210). I have to find something to lower my all of a sudden high blood pressure 195/100 to a comfortable level without these life hindering side effects. I have a lot of living left to do and I'm pretty fit, but now since I started these meds, I feel like I'm 70 yrs. old.