Am I wrong

Am I horrible for still feeling a bit sad that I'm never gna have a daughter of my own? I love my first son and just always imagined I'd have a little girl too some day. My SO has a daughter from a previous relationship and sometimes I can't help but feel a little jealous that he has both and I never will due to we only want 3 kids and that includes our two and his one. 😢 I just can't help but feel a little bitter knowing I'll never ever have that bond with a daughter I imagined for a long time. Yes I'm well aware of my chances being 50/50 and I still love my baby. I'm just feeling a bit sad lately. And I can't seem to shake the feeling.