Tick Freaking Tock

So my birthday is coming up soon in October, I will be turning 37 and I have yet to have a baby. I have always wanted to be a mother and have been honest with all my relationships. Unfortunately I have waisted 10 of my most fertile years on a man who lied about wanting children too and even had gotten snipped before we met and never told me. It's been almost 4 years since I divorced him and I have had a couple relationships since but I'm beginning to fear ( I mean truly I'm am terrified) that I may never be able to have the child I have always wanted. I know that it's always a possibility that one must accept. However sometimes I feel like what's the point of being human if i never have the opportunity. I'm not at the point where I have completely lost hope yet, but I feel the clock ticking quietly in the back of my mind. I am not sure what I am looking for from this post, perhaps advice or reassurance or just your thoughts about this and your experience.