Considering a 3rd child but I just turned 40!

Dee
I have always felt we would have 3 kids but my husband was done when we had our second. I've mentioned it a few times over the past few years and he wouldn't budge. Yet, I couldn't stop the feeling that I was meant to have one more...so fast forward (our kids are 13 and 11) I just turned 40 and was ready to put this behind me and my husband says he'd be willing to try for a third...Is it even worth pursuing at this age? I'm so afraid (and a little excited!) I would love to hear from someone who conceived at 40...TIA