I have a phobia about TTC after 35. 🙈

I am legit scared out of my mind about having a baby past age 35. I will be 36 in March, have two healthy boys (8, and 5), and still feel like I should give it one more shot, but am too scared to now. I feel like we should just move on. But then I wonder of I will live in regret. But, if we do try and conceive, what of that child (God forbid) is not 100% healthy. I know this is unrealistic, but I was I could know with certainty that if we give it one more shot, I am guaranteed a healthy baby. This is serious phobia and I don’t know what to do with it. It has owned my life for the last few months and I don’t know what to do anymore. Anyone else in the same boat?