Cytoxan and hair loss

I had 3 big slugs of Cytoxan at the start of October (the 5th). Almost 3 grams IV, 3 times, every 3 hours. It caused my hair to fall out, but not ALL of it. I’d estimate that about 95% of the hair on my head fell out. I still have eyebrows, still have to shave my legs and have hair on my arms. The sides of my head look bald, and the top has a little bit of inch long hair. I’ve never like having short hair, so this is going to be different for me. I wear a hat when I go out.