Female and stress hair loss

I (F27) have recently moved to UK . I don’t know if it’s the weather change or the water but I am losing a lot of hair. The wash days are an absolute nightmare. If this continues I believe I might go bald. If any kind soul here can suggest what can I bring in my hair routine to stop this severe hair fall and promote regrowth. I want to avoid surgery or transplant as much as possible.

What you describe is stress and stress hair loss can produce a telogen effluvium, reversible over time in most young females. You should see a dermatologist to manage your hair loss.