Chemo Mouth - has anyone else had this?

I was diagnosed with CNS Lymphoma on 7th April 2020 (Happy Anniversary). I had 16 rounds Chemotherapy which sometimes left a nasty, indescribable taste in my mouth. A few times lately I have woken at night by the same vile, horrible, metallic taste. It has me coughing and has me close to vomiting and I will eat or drink anything to help get rid of the taste. 

Wondering if anyone else has had it?

I really thought I was finished with the majority of my treatment but now my mind is beginning to race again.