The meditation explanation doesn’t really seem applicable here. The effects obtained through meditation are through the removal of stress, not an increase in it: it would seem doubtful that within days of moving in, she suddenly started meditating and it had all the negative effects that she described instead of the expected benefits and she didn’t make the connection and she stopped meditating and causing this to herself within a week of moving out.
I didn't mean meditation specifically. Just a proof that psychosomatic effect can be that large. I don't think we have enough details to discuss how likely that is or other details.
