@kat
Just from what you have stated here, you are suffering from stress that is brought on by the situation you are living in and self doubt from not finding an alternative due to the COVID-19 outbreak and quarantines. You are feeling trapped which is spiralling you down into self-destructive behaviors such as excessive worry and not so healthy food choices. You and your concerns are totally valid, especially now where cleanliness is essential.
If you have the option of being able to relocate to a family member's home, that would be your best bet. But if you must stay there, just make sure the washing machine it still working and keep your stuff laundered. Keep a toilet towel available for use when you do need to go. And be sure to keep any of your stuff separate and apart from theirs.