Hi Julie.....I worked all through chemo last year (school business manager) as I needed to for sense of 'normality', approved by my Onc. However, she insisted I stayed at home during the few days my white blood count was anticipated to be low. Had FEC-T and was hospitalised once....1st 'T' with an unknown infection, possibly masked by oral thrush! She did say we're more at risk from ourselves, i.e. scratches when gardening, eating unpasteurised food or dodgy takeaways(!) than from other people.
As the chemo effects tend to be cumulative, and everyone reacts differently (no-one can predict what side effects you personally will have) best advice I can give is to take each day as it comes, listen to your body and do what feels right for you. Looking back I thought I was OK and functioning this time last year, but can actually see now how slow (in all respects) I was!! 5 minutes to walk across playground that now takes me 30 seconds. Also made silly mistakes like forgetting to click the 'submit' button for a funding bid and then having to re-bid 6 months later......
With a very supportive Deputy Head and team, I was enabled to do what I could manage, and absolutely feel even now that it was the right decision for me personally. Not sure I could have managed a long absence and phased return...at the end of the day it's your decision and you will make the right one for you.
You take care x