Pain tired and weakness in brain. To do?

I have high blood pressure from past 1 month 150/100 and I am on meds from 15 days and blood pressure is 110/70 but from 1 month I feel pain tired and weekness in brain When I sit for half hour or stand for 10 minutes I can't even excercise for 5 minutes all my tests are normal liver kidney diabetes sonography is normal but brain has become weak some times 137/84 feels like 150/100 ECG report is aslo normal but from past two years I feel exhausted on walking I can't walk more than 1 km but now after this high bp has affected my brain I can't even walk like small distance or excercise for 5 minutes if I do excercise I feel like pain tired and weekness in brain bp is normally OK due to meds but I feel like vomiting and little pain in head I don't know what to do