I dont think you are foolish to feel this way at all!!
I feel so similar, TTC is soooo hard, especially after a loss I think
You will NEVER get over the loss of your son, but I feel the same way, having another baby will help fill some of that void we have.
I have 2 kids to, but that doesnt make it any easier, we want a BABY!! our kids are no longer babies, and our need for a baby is just as strong as anyone elses, if not stronger because of our loss, kwim?
If i get a BFN this month i know i will be a big wreck, I really hope we both get our BFP's VERY soon!!!!!!
I would talk to your husband if i were you, my husband doesnt always remember, but if i remind him, he is right there and wants to do anything to remember our baby by. they are just put topgether differently, LOL.
((HUGS))