New here have questions about hysteretcomy

Hi there, my name is Natasha, i am about to turn 39 in a couple of days, i was told that i have uterine cancer, at least i was told i do...i had a double hernia repair back in 2007 so they are unable to preform a scope. My monthly cycle is 28 days but my period lasts anywheres from 11-17 days. i have been over weight since i had my first child in 1992, i have had 4 children total, there ages are 21,19,7,and barely 2. I have also had two miscarriages one in 2008 and the other in 2010 I am waiting for a total hysterectomy on june 13 2013. Since i started with problems after my last son was born i have been losing weight at an alarming rate....since october 17 2011 I have lost 112 pounds and i have not been trying...i have lost 30 pounds in the last two months and it's starting to worry me...i am not dieting, nothing has changed maybe a little more stress, my seven year old has autism but i have known about that for years. I am just wondering if anyone has had the same problem...not that i am complaining about losing weight, this is the smallest i have been since i was in my early teens but its too fast, i have lost 8 pounds just this week and i am eating everything and anything i can get my hands on, regardless the calories. thanks so much.