I agree with the others that we need to know your meds to help more....
But I would also give you the initial advice of get on some Folic Acid supplements. It seems the Crohns affects my hair and nails a lot also. The folic acid has reduced the shedding and helps keep my nails less "bumpy" and less brittle.
As for the foul taste...my first suspicion would be som med (I know I took one that made the worst taste ever). I also know I go through taste bud changes regularly after 22 years of this disease. You might want to check your toothpaste--that was my recent issue. Especially when I am in a flare up (but even when I am doing well), whitening toothpastes are too harsh for my mouth. I switched to Crest ProHealth Sensitive and have less issues now.
Let us know some more and I hope you are feeling better today!