Down in the Dumps Today

We've been trying to conceive for almost five months now and with each passing month it gets harder and harder to be positive. We're three days into my fertile window and trying to have sex every day this time, but we started three days prior to my fertile week. I am exhausted to say the least. I know you're not supposed to make sex into a chore when you're trying but when each month you continue to have the same disappointment you feel like you have to do something different this go around. I am unbelievably nervous that I'm unable to conceive due to my weight. I'm overweight, probably considered obese I'm sure, but trying to lose the weight too. My husband has an aunt that got pregnant at 40 and had a child, countless number of friends who just got pregnant without even trying and multiple friends and family who got pregnant within the first month or two or trying. It gets so discouraging seeing how easily done it is for some people.