No you are not crazy.
But what struck in your question is that you write your partner wants a baby and that you don’t say that you both want a baby ?

I hope all is well with you and your family.

Personally I would feel unable to cope with a newborn at 47, but not all 47 year olds are the same. I wish you all the best with your decision.

It’s up to you, there’s alot of mums these days having baby’s when they are older. My aunt was 40 when she had another son Just talk to your doctor about the risks

I suppose only you can answer that question. Put it into perspective with your family/lifestyle. If you have a baby now, you’ll be almost 70 at their 21st birthday. Also take into consideration your health. How would you cope with a newborn at 47? Best of luck!