Trying & Frustrated

Hey Gals...this is my first post, EVER. The first time ever really verbally acknowledging this. But my SO & I have been TTC (consistently) for about 3-4 months. Maybe longer. No success. I have been trying to be optimistic...and he is just frustrated. We REALLY want a child. I don't know what I else to do.

My friends are pregnant and I am really happy for them, it's just that I also want that. And I don't know what more to do. I have regular periods. I try to do it around the right times. And I am over 250 lbs. I don't know what else to do...HELP!!!