You would be doing yourself, your children & any possible future baby a grave disservice by trying to force a child (or 2) on someone who does not want to be a parent. Trust me....I learned the hard way. I wasn't nearly in as bad a way as you are....but I did want to cycle sooner than my husband. I cried really hard & he agreed to try once. I have twin girls from the first try....they are the total lights of my life. But their father spent the next few years seething with rage that his life had been hijacked by my desire to have a baby. He left us & continues to torment me years later. I now have to send my precious girls to visit a man who hates me & tries to turn the girls against me. He is currently threatening me with exposure as a "liar" because I haven't announced on the 6 o'clock news that my girls were conceived via DE.
Your desperation in & of itself would send up a huge red flag about your readiness to have a twin pregnancy & twins. It is a risky, wonderful, terrifying journey & must be undertaken by moms in a good place emotionally & relationally if at all possible.
I wouldn't change a thing about my life because the road led to mothering my angel twins....but it can come with a very high price for the children when both parents are not equally committed to the process.
Good luck to you...I hope life treats you well.