It is totally normal to feel like that. You have spent so long on the actual process of getting where you are now, sorting out problems and having to check things, that you dont have much time to actually think about the actual move, and it can feel a bit of a panic. If you can remember why you decided to move perhaps you could write a list of all the reasons. You may remember quite a bit, but now I think you will have more reasons, So thinking of all the effort you have had to put into the move, just think how much harder it would be in 10 years time!
Perhaps you could also look for some of the positive things about the area you are moving to. So, could you spare a day or a morning to go to the new place and visit the library, where you will find the up to date information about all sorts of clubs and groups for any hobbies you may have. Then you can look for the local paper and start to get that , as again it will begin to help you to find out information about what is happening there.
Another possibility could be if you had the time and money , just to go away for 2/3 days, and just let yourself relax and let the fact that you have done it after all the hassle sink in. Even if you cant remember right now why you wanted to move, you can still be aware that you definitely had reasons and would not have done all this work if there hadnt been good reasons. If you look back you have made many decisions in your life, and whilst no one gets things 100% right , I am sure you can trust yourself in the decisions you have made over the years , so trust yourself now. Best of wishes for a good move