I need advice you guys :( I want my son to have a sibling so bad 😭

I had my son in 2018. He will be 3 in a few months. My husband and I started trying when he turned one because we weren’t sure how long it would take to get pregnant again. With our son it took about 4 months so we hoped it would be fast! We had an emergency C section due to pre-eclampsia and magnesium toxicity. We are coming up on two years of TTC another child. My OB sent us to a fertility specialist. We didn’t several rounds of letrozole and one IUI. The IUI took about 45 minutes and 5 different speculums and various tools for an attempt and he was not able to even visualize my cervix. He states I have a large rectocele and my cervix is extremely high up. He referred me BACK TO MY OB to be examined. My OB says likely I formed crazy adhesions from my c section and my organs have been pulled up but he doesn’t think I will require surgical intervention and wants me to attempt ANOTHER IUI. But the first was so traumatic due to my anatomy that if nothing has changed I am terrified to re attempt.

Was anyone else diagnosed with secondary infertility after a c section? Did losing weight help you get pregnant again? I’m not the smallest gal. I’m 5’4 and 210 and I’m feeling extremely defeated and depressed. Looking for advice/similar stories because I’m about at the end of my rope.

Sorry this is so long. Thanks for reading anyway!