I am on humira and have not experienced the hair loss so I hope someone else can answer that for you.
As for the pred, in my experience it will go away. I know it is hard to look in the mirror and feeling like you do not recognise yourself, but it needs time to get out of your system and get back to normal. I would not wax. After long doses of pred it always took a bit longer, but it did go away.
I hope it gets better for you soon.