I think I actually deleted the first and most important part of my reply. Darn technology!
I am so sorry that you have had such a bumpy ride. I really hope Ukraine works for you.
Before you do anything make sure that your clinic has worked with your nationality and where you reside to check if they know how to file all the necessary documents and take all the required steps to get your child home. This is the first thing you need to know. They should know exactly what has to be done, what steps need to be taken, how long it will take and how much it will cost. Some clinics include exit documentation and some do not. Make sure to double check this with a lawyer. Each nationality and country of residency has a completely different time frame and process. I only work with US and UK couples, but they are night and day. You must be sure you have someone taking care of this before you start. Some countries require documentation before the process begins. Some countries require steps not only in Ukraine, but in the home country.
Be sure to check this out very carefully and multiple times.