I had something similar happen. I almost never go on vacations, but a few years ago I went to the beach for a week with my friend. I was having so much fun and I was finally relaxed. I noticed that my contamination OCD was SIGNIFICANTLY better, and things that used to trigger me didn't anymore. I felt like I'd finally found peace, so when I went back home and everything returned I was devastated.
I understand you. Ocd is unpredictable, we never know when it's gonna get worse.