lela, just wanted to post as you could be describing my feelings when I found out the sex of my (first and as yet only) baby. It was a girl. Words cannot describe how much I wanted a boy; I was devastated. It's not something you can admit to in many circles; hardly any in fact.
I now know I was suffering from ante-natal depression. All my fears and anxieties about having a child were projected onto the gender of the baby. I hated, hated women who were pregnant with boys as I so desperately wanted one. I didn't like girls and, like you, felt that my life was ruined. I too thought that I would never accept it.
I had counselling with the ante-natal counsellor attached to the hospital; I'm afraid I haven't read the whole thread so don't know if you are already receiving specialist ante-natal counselling; but you need it and you should be receiving it. Speak to your midwife. Interestingly, my counsellor said that she had seen lots of couples, particularly mothers who had experienced gender disappointment after years of infertility, miscarriages and IVF. In a way, she said that they had had more time to construct an image of 'their child' in their head, and had naturally ascribed it a gender. most commonly, the imagined child was a girl and they were pregnant with twin boys. I was green with envy at the thought of them having boys. I felt like a failure who had spoiled my life.
I also had to face up to a lot of issues of my own- including my own relationship with my mother and issues I had with my own gender. It was my biggest soul-search to date, and one I am very glad I did- there are positives to feeling the way you do in terms of getting to know yourself and dealing with issues before your baby is born, even if you can't see or feel them now.
At a growth scan at 34 weeks they found out that DD was breech, so I opted for an elective cs; a decision which I was happy with.
And then she was born... and she wasn't a boy, but she wasn't 'a girl' either. She was mine. She was an Angie.
I still felt disappointed, but every day the disappointment lessened and was replaced by love for her. It wasn't an instantaneous process, but I fell utterly and hopelessly in love with her in a way which I could not have anticipated. You cannot know how you will feel once your baby is born; don't try, it's impossible. Just know that you will love him, and you will love him a thousand times more than your imagined daughter. Have faith in that.
I am now in a place where I would not swap her for any other child of either gender, and would quite happily have another girl and feel my family was complete. I genuinely don't mind what gender my next (as yet fictitious) child will be.
If you want to message me, please feel free- I know how it feels to be disappointed with your unborn baby's gender and the implications for your own mental health.