Overweight and TTC

Jamie • Im 26. I have a 6 year old daughter. Im married to an amazing man name jonathon hes 23. Were having problems conceiving
Me and my husband have been TTC for over a year. I had a miscarriage in march. I've been told that if I lose weight it will help our chances of getting pregnant problem is I can't seem to lose weight. I've tried everything but I can't loose any weight. Does anyone have any suggestions.