Our dog was on Tramadol as well after his amputation, and we became very familiar with the restlessness you describe.  It's upsetting, but probably not that serious.  It's very common to have to adjust the dosage a bit during the recovery phase, because Tramadol affects individual dogs very differently.  Consult with your vet and see what they think.

There may be something you can do as well.  After our dog's amputation, he had a few restless nights even after we adjusted the dosage, seeming confused and out of sorts.  I went to a sporting goods store and purchased one of those inflatable air mattresses used for camping, put it on the floor where Max liked to sleep, and got some blankets and a pillow so I could sleep there as well.  That way you can lie down comfortably next to your dog, and maybe sleep with one hand on him if he likes that sort of constant contact, which many dogs do.  Dogs are pack animals, and they take comfort in closeness to their people.  Even if the Tramadol cuts down much of the pain, Winslow still knows he doesn't feel quite right, and that may be a contributing factor to his sleeplessness.  Having me on the floor right next to him calmed Max down a great deal, and allowed all of us to get a good night's sleep (which is even more important for you to have, since Winslow is relying on you now more than ever).

It may not be as comfortable as your bed, but those air mattresses are pretty good if you do it right.  Fill it up to the point where it's firmer than you like to sleep on, then lie down on it.  While you're still lying down, let air out of the mattress in very small increments until it softens to the point where you're comfortable (sort of a poor man's Sleep Number bed).  You'll sleep well enough after that, and Winslow will probably calm down a bit if you're right there next to him.  And don't worry - this part after the amputation sucks, but it WILL end in a few weeks.  Just grit your teeth and get through it as best you can.  Good luck.

I don't know if it would work, or if Winslow has an appetite yet, but until you got the restless nights figured out you might try distraction techniques. My epileptic dog seemed most of his seizures at night. He would be very restless, confused and out of sorts after and I started giving him a kong frozen with peanut butter and kibble in it. it helped calm him.

That's super great to hear that Winslow is reacting to withholding Tramadol so positively! My baby, Cassie, also seems to be having some negative reactions (though not conclusive) to Tramadol and her surgery was just a day after Winslow's, so I am very interested in learning how he does without Tram.  Please keep us posted on his progress and good luck!!