 [ Symptoms ] why can not i lose weight  i am a 24 year old female and in the overweight category for my bmi i have been working with a trainer and on a strict nutrition plan since june now four months later i have yet to lose 1 lb my trainer and i are perplexed i am so frustrated my gp thought it would be a good idea to check my thyroid electrolytes and cholesterol and everything came back totally normal why can not i lose weight is there something else that could be wrong with me [ Disease ] hi ok you say a lot of sex before your due date that is not a good idea he could end up ejectulating immature sperm which would have been no good but if he refrained for a few days before the third day you first had sex trying to get pregnant then that may have been the time you got pregnant if you have it takes male sperm 3 days to reach the egg ok when you next period is due and nothing happens then its time to do a test either a hpt or with your doctor do hope this helps good luck