Advice please?

No judgement please, I did post this in an additional section but I figured the more advice the more help possibly.

So I was debating on posting this because I'm beating myself up. I have this eternally battle going on and need some advice. I know I should be over the moon because I an pregnant with my second, when some couples are struggling to get pregnant. My husband and I have an a-freaking-mazing 3 year old daughter. We just found out yesterday we are having another girl. I cried once I was alone. I just can't help but feel bad that my husband will never have a son. (We're done after this). Being the most amazing guy I know he said he doesn't care as long as it is healthy. Oh and I should mention that he is the IV. So are we also killing his legacy. (my husband wasn't even sure if he wanted to have the V but at least he could've had the option). Any advice how to get over this? I know I'm pregnant and hormones and stuff. Lol

And to boot, I know my father in law very well. My husband and I have known each other for a long time even before we started dating.. He's great inside and out. And I love him dearly. But he made a joking comment that its up to my brother in law to have the boys now. THAT kinda stung a little.