I would help, but I have little control over your mother. I would think starting the day with a shower, it wakes me up. Waiting till nine?
In our humid tropical climate, soked clothing in twenty minutes, showering several times a day is not unusual. No one has died from being wet that I know of. Some shower and take dips in the pool, and shower after that.
Running water is calming, I like it. If I was running yourself, as others seem to think they should, I would suggest you go take a shower, till you told me to shut up. I have known a few girls, they showered and change clothes, it seemed every few hours.
Forced showers were used in mental hospitals to calm people, it is a treatment for Typhiod Fever, and other fevers, and you did mention your body termostat was not working properly. It seems a harmless self medication to me.
It seems to me lack of showers is causing mental distress.
Then again, was she planning on washing clothes, doing the dishes, and not wanting to steam and freeze you? Sometimes mothers have reasons. Mostly I do not understand them, but that is why we grow up and leave, it is a package deal, they raise us and get rid of us, and are not aware of it at all.
It is 4 AM so I hope you got your showers and are sleeping with good dreams.