Unfortunately you’re going to have to compare yourself today to yourself next week. The old you is gone. Time your mile and try to improve as long as there is no pain. You’ll be back at 5k soon, 3 miles is doable!

You could use a rearward system, if you’ll hold to it. Only allow yourself to watch a certain show, or play a particular game while on the treadmill. I do not mean watch TV will on the machines, but only watch THAT show while working out. That way for you to get your fix your have to work for it.