Welcome (sort of) to our select little group, @IssyK - the one group we NEVER thought we'd join xx .....
Personally, I didn't do chemo, but hopefully someone else will jump on with suggestions to help with this rash :(
I am SO sorry to hear of this nasty side effect to your chemo treatment - I would definitely make contact with your Onc ASAP & take photos of the rash (everywhere) and send the pics to them, as many medical professionals are about to go on 'Xmas Break' until about the middle of Jan - and I believe you should be seen BEFORE they go 'on leave' to try & rectify the problem. xx
Keep taking pics (whether it gets better OR worse) - or a telehealth video call may be helpful, if you are not able to see them in person.
You might like to join the Young Women's group which is totally private ..... you can raise any issue there. Click on 'Join' to connect with the group.
https://onlinenetwork.bcna.org.au/group/10-young-women Whereabouts are you? (General area?). You can add this to your profile - we may have members nearby who may be able to point you to someone in your area that may be able to help.
Also check out this post, for lots of general info on the blog - even showing off your fur kids, art & craft, even 'funny bits' that may be able to give you a giggle.
https://onlinenetwork.bcna.org.au/discussion/23477/a-big-welcome-to-all-our-new-members#latesttake care & all the best xx