Hey OP! I guess we are dealing with a double-edged sword right? You've managed to get over a life-long addiction to Cocaine, but now it looks like you're rebounding into the loving arms of Methamphetamine. It's a total bitch and it's undoubtedly a negative situation, but we are here to help you 100%
First, I'll echo what my comrades have put out there, in that that color of your urine is almost undoubtedly a result of dehydration. Obviously, you're going to want to try to re-hydrate as best you can. It might not be readily accessible, but gatorade was always my go-to in these situation. You're probably not too hungry, so the gatorade is a good way to get you hydrated and get some calories in you.
One of the most difficult things to do in these situations, is to actually get a true perspective of what you're going through and how bad the situation is. When you've been awake, on Methamphetamine for days, I'm not surprised that you're a little bit freaked out. This is normal. I'm not there, so don't take this as fact, but I believe it's unlikely that you've done anything serious to your body or mind over a 3-day binge. It's obviously terrible for your body, but it's not likely that you have done anything terrible or permanent.
My advice would be to wait and watch. As you continue to come down, keep track of your symptoms and absolutely don't hesitate to contact one of us if you feel you've got problems above and beyond what we've discussed here.