Is my weight to blame?

I’m having such a hard time conceiving it’s breaking my heart. I’m 26 and I’ve only had one pregnancy, back in 2014 and my daughter is six now. I was mid 300’s when I had her. My husband and I have been unprotected for years now and nothing has happened. I did gain weight since then. I started seeing a obgyn, she ran some test and took blood nothing stood out. She said I didn’t show any signs of pcos besides of weight gain. I’m also a type 1. I’m doing opks im getting positives. But still no pregnancy. I know you can’t give medical advice I’m just asking for your opinion. In your opinion do you think it’s my weight holding me back? And in your opinion what should I do or take to help me.

Thanks for the advice and help. 😊

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