Upon Waking I Get A Warm Feeling Throughout My Body

Upon waking I get a warm feeling throughout my body then I begin to sweat profusely. While this is happening my heart is racing. Then i am thirsty. This lasts for about 5-10 minutes. Then I get a cold feeling with goose bumps and all and I... shall I say, dry up. This happens about 4-5 times a day. I do take lisinopril 20mg 1x a day