Losing my hair day after I joined hostel

For context:

I'm a 21 y/o guy with no family history of baldness neither paternal nor maternal side, I've hair type 2B which is kinda wavy. I don't any of the products except the ustra pomade wax and homemade sea salt spray that too occasionally. I'm facing this hairfall issue from teenage but that time it was very minimal and bearable, I didn't use to take the stress bcz More stress -> more hairfall.

But now things are getting extreme, I'm not able to style my hair in that, I used to push my hair back but bcz of the low volume,my hairstyle looks like shit that's why I'm thinking to change into fringe Or messy hair style. It is becoming bcz of the HOSTEL WATER which is hypersaline. It is making my scalp itchier. I try to avoid to bath with that water, but in the hurry I certainly get no options left. Idk what to do, I'm very stressed the everything which add quality to my face are my hairs. 😭

Suggest me products which will help me to regrow my hairs or at least stop them from falling.