Hi I'm concerned I'm 23 years old i have one child and I don't have periods anymore I'm not pregnant or on birthcontrol I have a lot of menopause symptoms what could it be .I get big reactions when I say I Havnt had period in 5 years.I've had ultra sound recently and was good nothing ad far a cyst.I'm 145 lbs I recently lost alot of weight. No reason why just did I have strong history of cancer in family mom has thyroid cancer brother hodgkins