tea4two4three I really hope you will get over this in time or at least work out how to handle it in a way you feel OK about.
I have a birth dd (10) an adopted son (4) and have no desire to be pregnant again or to care for a new baby. But today one of my son's classmates poked my large round tummy with her finger and asked me if there was a baby in there! And just for a minuscule second I wished there was too.
I had a lot of counselling during my fertility treatment because we used donor eggs (which never worked) and this did help me to process everything.
I am not sure I can give you any guidance because for me it was a spiritual part of my journey. I am a Christian and I felt very angry with God that I had found it so hard (impossible) to have another baby biologically. However, I did not realise that I was so angry, I was suppressing the anger in a kind of bitterness! I had not really acknowledged how I felt! Anyway, I went away for a Christian weekend and the anger and bitterness kind of melted away.
So I guess I feel you can sometimes find some help in external things but the feelings are internal and at some point I think feeling a sense of peace about our lives is coming to terms with our own particular life. Genuinely coming to terms with it, which cannot be forced, others cannot make us feel it, and to some degree I feel we cannot make ourselves feel it! We can work through the feelings and sometimes the 'peace' can kind of sneak up on us!
For what it is worth being pregnant was awful for me! I nearly lost dd at 7 and 15 weeks, had a C-section, an infection, I could go into details, all pretty grim, and generally it was all pretty grim. But I was still 'desperate' to have another pregnancy and another child.
I am so much happier now my family is complete but I must admit I did feel it was complete before ds came because I came to terms with not having another child before we went into the adoption process.
Anyway, good luck, the best thing IMVHO is not to suppress your feelings but to think about them and work through them, and to also remember to count the blessings you do have. So being realistic about the pain you feel and still feel, or upset or whatever but also to feel the joy of the good bits.