How long has this been affecting your life for OP, when were you diagnosed. Two very close friends of mine have had very different fertility issues, one TTC about ten years ago, she went through IUI and other treatments, and was offered IVF but decided not to go ahead as she wasn't sure her mental health would cope , she suffers from GAD. Almost a decade later she is NC with her BIL and SIL , because she felt they didn't handle telling her they were expecting in the right way, honestly she never liked SIL but was very close to BIL , her DHs brother, it wouldn't have mattered how they told her, she is very angry that someone she disliked and doesn't think is a fit parent could have what she wanted, she has no children and now has no contact wth two lovely DNs and it has torn her husband's family apart, the brothers used to be best friends.
My other friend found out 18 months ago she has gone through menopause, she is 36, only in the last five years has she been with a lovely long term partner, something she didn't think would happen for her after a couple of shul relationships. He has a child from a previous marriage and she dotes on that child they have him all the time and she gets on brilliantly with his mum and has made a massive effort for this to happen. When I had to tell them I was pregnant the first gave me huge anxiety, I over thought how to tell her, planned each word, I was so desperate not to upset her and whilst she says she was fine and she's excited for us I can feel the distance. Friend two was amazing, she could not have been more supportive and is very much looking forward to playing an 'auntie' role.
I guess I've given you these examples, as they are both women who are unable to have children, they have handled it very differently and ultimately friend one has suffered for a long time and can't let go of it, it has affected what were good family relationships and definitely affects her on a regular basis. Friend two has coped amazingly and has a lot of wonderful people and children in her life. You can choose which route to take and I'm not saying route two is easy it isn't, but for your own well being don't get stuck on route one.
I think all of the suggestions of further therapy are spot on, you have a child rejoice in that rather than what might have been and seek help to move forward before your relationships are affected more than they have been.