How can I know if my estrogen level in the body is normal or not. Which test should I go for?

Estrogen levels. If you are menstruating, then your E levels are good. If you are concerned about peri-menopause, or if you've had a hysterectomy, or if you're having symptoms of menopause, a blood level of LH and FSH (pituitary hormones) will be elevated if the E is low. Talk to your doctor.