Am I too old?!

I turned 42 last month. I have been with my partner for 1 year and we just bought a house together. We have 6 children between us. He has 3 and I have 3. 4 out of the 6 are teenagers same ages ( 2- 18yo, 2- 17yo). Then 12yo and 4yo. I always thought I'd have more kids. If we had a baby, this child would be sibling to all children. Although our kids are very close, I think it'll be nice to have a little one...

Hubby says he doesn't want anymore but I do! I'm a little worried about my age...am I too old?

I am removing my IUD next week and I will see what happens...