Aww, be kind to yourself- like MLG said, an international move is full of all kinds of emotional upheaval.
I know a lot of the folks on here have been filled with fear and doubt and anxiety as they make the move for their marriage. So (because I didn't move for a partner) they'd be in a much better position to help you on that side of things and also give you some tips on how to deal with things.
Even if you've visted a lot before, it will be permanent now, it will now be your reality.
MLG gave you tons of links, but yeah, agree, there is tons to do, you just need to look for it. But don't rush out and get into things straight away if you don't want. Take some time, get on your feet. Its overwhelming- even just going to the grocery store can send someone into a spin.
Many of us have done the move OK, some of us moved in quickly and easily, some took lots of time to get on their feet, and some people never get on their feet at all and have had to work out alternate plans. And that's completely OK as well as we're all individuals and have different coping skills or different things that pull us to where we are.
Also, it would really be good to talk through this things with your partner on how you're really feeling. Maybe if she's only a few years from retirement, she may want to finish working and then maybe move back to the US, if you want that. Or maybe you'd want to keep your relationship on hold until then. Or maybe not. But my point is you need to work through these things with your partner.
(((hugs)))