I weigh 86-89 and I'm 4'11" my metabolism is so high, my mom is 5'6" and weighs 120 so that's where I get it from. But I'm trying to gain weight and I know you have to ovulate and have a certain amount of body fat and I would like to gain 20 pounds but healthy though I don't want to load up on fast food and fried foods. Do you think I can even conceive and carry a baby to full term? My periods are 26-40 days. Help please?!?!