ashamed for wanting a baby at 43!!!

About a couple of months ago. I tried to share with my family that my husband and I are trying and my family basically telling me that I should be enjoying my life. I already have a 18 & 14 yr old and my son had a baby at 16. Which makes me a grandma. I mean I love my granddaughter but I don't think it's fair that my husband and I was trying 2 yrs ago but kind of gave it a break.  My husband does not have any kids and we've only been married for 3yrs( been together for 5years). I want us to have our own as well. My family makes me ashame to even wanting one. They always say my eggs are old so it makes me ashamed. Am I wrong that  I don't feel guilty  about wanting a baby and I'm considered a grandma. My son had a baby tooo early!!!! He wasn't supposed to be a dad!!! I'm so mad!!!