I have 2 kids and I'm 5"tall and weight no more than 85 lbs.. I love food and I eat a lot.I'm not trying to lose weight cause I don't like to look skinny.. I can never gain weight and when I do I lose them after a while.. I've gain a lot of weight when I was pregnant but I lost it after I had the baby... I don't know what to do,I've tired to gain weight but eating just doesn't seem to work.. what can I do? Should I see a doctor? HELP! :(