Feeling frustrated but determined

Cuba was lovely and everything you expect. I certainly wouldn't call it a culinary capital of the world though, but aside from the food, the resort and the weather were awesome. I managed to run almost daily before the sun got too hot and took the rest of the day to recover by the pool or beach; it was glorious.
Then it was back to reality and we got hit by almost a meter of snow in 3 days. It was rough but we all managed to shovel our way out. Then I took my daughter sledding and trudging through the knee-deep snow. This was NOT a good idea. I thought I could handle it but after a few minutes the old familiar twinges of pain in my knee started creeping back. It took me days to admit I tweaked my knee, and even then it hasn't kept me from my running schedule or my lifting. I'm so incredibly pissed at myself for not being more careful but at the same time I don't want this issue to keep holding me back from doing the things I love, with the people I love. So I solider on, and pop a couple of ibuprofens before bed so I can sleep mostly through the night.
Running has been going well, despite my knee. I'm back on track after my vacation and with the help of my treadmill, clocking the miles hasn't been impossible. I still hate the treadmill but if you have a meter of snow outside, there's not much choice.
My weight lifting has been going well too. I used the gym in Cuba which was an interesting mix of broken equipment some things from the 1980s and one or two newer pieces of cardio equipment. The most frustrating part of working out in another country was not having a bloody clue how much weight I was lifting, as everything was in kgs not pounds..and there was virtually no wifi, so yeah I couldn't even "google" it! So I lifted the heaviest weights I could and hoped it wasn't too far off what I lift at home. I was happy to find that I was pretty darn close when I got back!
My diet has been better since vacation. I'm back on track with my morning protein shake and post workout shakes, and I'm trying super hard not to snack at night unless its something like a banana or something with lots of protein. I feel a bit lighter but I'm waiting until tomorrow to weigh myself since I have a couple of calorie-busting runs to do between today and tomorrow, in addition to my leg and abs workout.
So yeah, I'm plugging along even though my knee feels like it did a year ago. Setbacks suck but the most important thing is to continue to move forward, even if they are baby steps.