There’s a chance, OP, that you might have carbon monoxide poisoning if it’s true that you “became paranoid all of a sudden”. For anyone with gas appliances, regularly check that your CO detectors are working.

I don’t mean this as a diss or to invalidate your (totally valid) concerns about data privacy.

Simplest answer: cotton. It’s cheap and good enough for most uses. High-grade cotton like Supima is extra comfortable and not much more expensive.