My heart is breaking.

Ca
I'm in my early 20's. I've been trying for 14 months with nothing. I am over weight, which I'm trying to fix but every month I get a negative, my heart breaks more. I know I can have children. I got pregnant with my son when I was 15, but now that im so big, nothing is happening. I feel hopeless. Idk where to start with losing weight. Will that even help? Ugh. Just venting I guess:/ any kind words are welcome.