Tiny, yes do give the coldcap a go. It does work for lots of people. Malt's spot on saying take paracetemol as that does really help. I'm glad I did it, but was a bit like kitkat, so had massive bald patch, but some hair front and back. That was brill as it meant I could wear a scarf over the top. I had pavlovian reaction due to FEC sickness too, so every time I put the cold cap on I threw up. Bit grim, but I did stick with it. btw, my hair came back curly, but not grey. Took a while, but curl's all gone now. 
Malt, glad you're back. x