Those symptoms are low estrogen symptoms you're describing. Sometimes when women have hysterectomies and leave the ovaries, they are more likely to go into an early menopause. It's something to do with removing the uterus which affects the ovaries and causes them to fail earlier than usual.
So seeing you have vaginal dryness, dizziness, headaches, low mood, palpitations - all of which are menopausal symptoms - if you are still under the age of 45, I'd suggest getting your doctor to run full bloods on you and especially FSH and estrogen. You might also need to repeat them 6 wks later. If you are over the age of 45, you can be given HRT just on symptoms alone, no bloods run.