OP, you haven't "completed life", but congrats on all you've achieved so far. Not many of us are financially secure and happily partnered by 35. You've done it, and this will give you a solid foundation for the next level of your life's game. 
I think it's natural to occasionally lob in a sort of purgatory, waiting for the next goal, purpose, direction to reveal itself. That's where you are now. You feel a bit blah, not sure what to do next. (Folks, this is NORMAL!!) Seriously, you need to get cosy with it, not fight it. To use a medical analogy, don't try to reduce the fever or the swelling; let the natural healing forces do their work. Take care of yourself physically, go for long walks, bake, craft things and let your brain sort it out, as it will.
May I suggest something that has worked for me? Ask yourself: WHAT PISSES ME OFF? What am I really annoyed about? What needs to be done in the world, or at least my immediate community? Can I help? Can I start doing it on a basic level and, if I like it, take courses and skill up to do something bigger?
When I review my own career, I see that success has come from my being able to identify what needs to be done, then doing it. (Usually without permission, heh heh.) Bosses have said "We really need to do X", then looked around and realised "Actually, Groovergirl already has that under control". In my first job, as a 17yo music shop assistant, it was as simple as compiling a list of bestsellers so that we could ensure our customers could rely on us for their classic rock music collections. We sold a shipload of Rumours and Dark Side of the Moon 
After my decade of bad luck I've lost both parents, endured redundancies, been cheated on and lied to, divorced and had to fight XH for the house, and lost friends who thought the divorce was my fault because I wasn't wifely and self-sacrificing I've emerged by focusing on what seriously PISSES ME OFF!!!! It pisses me off that my DF (cared for by me and my DB) was not able to have quality specialist care that might have staved off his dementia, simply because so few people work in this area.
So, on Sept 22 I will start my training as a student nurse. I want to specialise in aged care and ensure our elders find valuable, visible roles in society. This is totally different from my first career, and is a new frontier. I am 54 and fit, and my renewed sense of purpose has already spilled over into other areas; I''m doing ballet again, and after years of living in depression and disarray am getting my house and garden in order. IT FEELS SO AMAZING! Next level, here I come!
You can do it too, OP. Just let your blahs do their work.
Re your wanted DC, I'm sorry for your struggle. But 35 is young, and DCs could still happen for you. Now, here's a tough question: How fit are you? What aerobic exercise do you do? Some will hate me for saying this, but if you are even a little bit pudgy, get your fat down and your muscle up. Running or dancing will really tone up your endocrine system and help your body to work effectively -- and it's free, once you've got some decent shoes. I thought I'd never have kids, but at 41 and at my fittest I naturally conceived DD, and she is the light of my life. Not promising this will happen for you, but the fitter you are the better your chances. Good luck. 