I am 33 yrs old and having severe night sweats, dizziness when standing for a long period of time, fatigue througout the day, hot flashes off and on.?

Doctor. Please go see your doctor immediately! if you are acutely ill then please get to your closest emergency room/department!
Adrenal fatigue. Assuming you aren't taking any medications that could cause these symptoms, such as antidepressants, this sounds like a classic case of adrenal fatigue. (although it could be something more rare and serious) most traditional doctors won't recognize this condition, so be sure to find a holistic physician or alternative health care provider. This definitely needs evaluation by someone asap!