malt I had 2 steroids for three days on FEC (onc used minimum dose as it effects my glaucoma) on tax it is 8 for three days, starting day before, so same as you I think? They give you more on tax to reduce the chance of an allergic reaction.
Definitely ask for painkillers just in case - you are a Thu like me, so SEs likely to kick in on Sunday (day 3) and you don't want to be fighting with OOH service to get pain relief. I got tramadol - onc said I could double the dose if needed, but that wasn't enough for the first 36hrs (so I'll be asking for something stronger!) Hoping you won't get the bone pain though, not fun. I was also advised to take paracetamol/ibruprofen alongside tramadol if needed, so worth stocking up.
Heated wheat bags are great for the pain - I had four on me at one point! Also hot baths. For me it really was just give in and stay in bed - if you've ever had "proper" flu (the "can't get out of bed even if you want to" type, not the "man flu" variety!) then that's the most similar thing to how it feels. Also be prepared for visiting the loo frequently - maybe have some imodium ready.
Having a variety of things to nibble still holds for tax, not from a sicky point of view (which you don't get anyway) but everything tastes/feels odd and I didn't have much appetite. Melon straight from the fridge, fresh pineapple and bananas + milk to drink (only thing that didn't taste/feel odd for some reason - I would never normal choose milk as a drink!) were the best things for me.
One top tip I read online is to paint your nails black/dark colour, so I'm sporting a rather fetching Russian Navy at the moment - tax reacts with UV(the infusion is covered by a brown bag to protect it) and the theory is protecting your nail beds from UV will stop your nails falling off - no idea if it's true but it something nice/fun to try (you have to wear it for a few months after treatment too)
All this said, I'm hoping you will sail through tax as you have with FEC, but better to be ready just in case. (sorry this has turned into an essay!)