Plus sized, TTC #1, 9 months trying and I'm feeling down today.

Today I woke up super discouraged and feeling mentally and emotionally beat. I want a baby so so bad, but no BFP yet. My husband is super supportive and is excited to even be trying and is so hopeful when I test each time, whether is be ovulation tests or HCG, that its a positive. I am plus sized, was on the pill for 15 years, and have been trying for about 9 months. I am ovulating, per my opk, and have regular periods that show up every time, on time, usually at the same time of day. Has anyone experienced this? I have been working on some weight loss, and eating better, but even after 15 lb loss, I just feel sad about the negative each and every time. Any advice?