Signs of ovarian cancer?

I am 5'2", 108lb 21 year old female. My mother has had a hysterectomy at age 43 due to uterine cancer. I walk 6 miles a day and do not eat more than 1550 calories, yet my lower abdomen is intensely bloated. It has been this way for months, my clothes are fitting tighter, i am chronically constipated and have heavy periods. There is also no possiblity for pregnancy. Please help, is this a possible ovarian cancer sign?