I am 36 years old I had my partial Hysterectomy at 33. I am having hot flashes, clammy skin, fatigue, vaginal dryness, mood swings. Perimenopause?

Possible. What exactly was removed? Just the uterus and cervix? Was one or both ovaries left? Sometimes even if the ovaries are left the blood supply is compromised somewhat from dividing the blood supply to the uterus. See your provider for blood work to determine if you might be in menopause or premenopause. This would mean blood work.