Yeah, I m thinking you might, since it s for an entire month. When you re heading back, make sure you drink a lot of water to get very hydrated (NO diet drinks or caffeine), and if you even begin to get a headache, take a Tylenol or aspirin to stop it before it really gets going. Altitude sickness doesn t happen every time, so I can t tell you yes, for sure , so don t get too bummed. You may be just fine. Good luck!
You probably won t feel it, I live in Denver and went to sea level for 2 months and when I came back I was ok, but apparently you are prone to altitude sickness so when you get back here take a nap and drink lots of water, good luck.
I doubt you ll feel any difference when you get back. I ve been back to lower altitudes (Jersey) for long periods and felt nothing when I got home to Castle Rock.