Am I too old?

Cheryl
I'm 46 tomorrow and ttc my fiancé is 28 and we really do want a baby but my daughter says it's ridiculous and I'll be dead soon! It hurt my feelings but also made me feel stupid for wanting a baby but my heart still tells me to go for it!!
Then I fell pregnant and miscarried at 14 weeks...I am devastated,  so is he but he wants to keep trying! I am struggling to make the 'right' decision
Opinions please