Oh my dear, I am in your shoes. Well I was & my DS3 is 8 months old. I cried at the ultrasound & my husband made me feel like a terrible mom so I cried more. He doesn't get it as he has a daughter from his first marriage.
As for how I got over it, I didn't really except accept that I am the mom of all boys. No girls to compete for me being their only gal. That's all I got. I hope you find peace with this. I am still working on complete acceptance.
Jodie ~ wife & mama