When did you all hang your eyes and wash your hair?

I have bags under my eyes now on the 4th day, and it's past 12, so it's the 5th day... I've
 washed my hair with a shampoo cap twice so far
 , but
 it's cold and I'm getting a cold. Even though it's an apartment and the heater is turned on,
 I'm careful when the warm water touches my body when I wash my hair.
 While I was washing it, it got cold because of
 the water, so I felt a lot of cold.
 Also, I have medium-length hair,
 and when I wash it like that, the hair sticks to the scalp. The volume of my hair is different from when I bent over and washed it.
 I
 tried to roughly restore it with a Dyson Air Wrap,
 but it was too annoying, so I just let it dry. Is that because there is no volume?
 When did everyone close their eyes with bags under their eyes?
My hospital told me to keep it for 3 weeks, but I don't think I can do this... ㅠㅠ I have to
 go back to work next week, but I'm not confident with my hair without volume... ㅠㅠ