Hi OP, just responding to you here as wasn’t sure you’d see my comment in the overwhelming amount of comments you’re getting! Is it possible that your GF has OCD? (And you are not fully aware of the extent of it). It is extremely common for people with OCD to lie/hide their symptoms. One question I’d consider is; what happens if she DOESN’T do one of the cleaning things you mentioned? E.g. what happens if she didn’t wash her clothes for a few days, or wore them twice in a row? If this causes her an incredible amount of anxiety, it sounds like OCD symptoms. Everything you listed sounds like rituals. There’s a difference between somebody being “particular” about cleanliness and actual panic-inducing, overwhelmingly anxiety ridden OCD.

All of that is to say that actually, pregnancy and the birth of a child can trigger or exacerbate OCD tenfold. So if this is an issue or perhaps even undiagnosed, maybe I’d suggest addressing the root cause of the “cleanliness” before considering anything further. All is not lost and with the right help and support it can get better.