23 yrs old -female is been almost 3 years i haven't had my menstrual cycle and im worried because last time i saw a doctor they had found a cyst?

Get checked: if no cycle in that long you are increasing your risk of endometrial cancer, likely something is going on and you need a visit, ovarian cysts can actually be normal but no periods for 3 years needs a evaluation

See a doctor: you need to see a doctor. you are at risk for endometrial cancer if you don‘t have at least 4 periods a year. you could also have other hormonal problems that need to be addressed. this can be serious.