Relationship where both people have OCD

I have an official OCD diagnosis but my partner doesn’t, however i strongly suspect he has it. He is very paranoid about dust, contamination, and medical conditions. He obsessively researches for hours on whether a particular symptom or feeling is something to worry about, and convinces himself hes going through a medical crisis regardless of what the internet says. Mine is mostly harm OCD and i have intense compulsions to clean.

While we try to understand and reassure each other’s thoughts, we also definitely lean into each others obsessions at times, or at least I do. It’s getting to a point where I’m starting to think in similar ways when I feel something different in my body, like a random pain, and my cleaning compulsions are starting to be fueled by fear of contaminants rather than to ward off harm. If that even makes sense.

Has anyone else experienced something like this? Can OCD be “contagious” or get worse like that? Or are my obsessions and compulsions just shifting?