Well done, @kmakm - I started doing my 'own thing' about 10+ years ago
after I'd finished 'natural' menopause! (I now call it being 'assertive' - he might say it was 'menopausal grumpy'!)
Hubby has always been a 'stay at home' (unless it was a triathlon somewhere .... then it became our 'holiday' in our campervan, to attend a triathlon competition! The only bonus was that it is usually on the coast & I am able to have a fish as well!) However, I got a bit sick of that after a while .... so started meeting up with fellow kayak fishos (& now uke players as well) for weekends away at either fishing events or uke festivals!
Prior to that I was like a puppy, following hubby around all his sporting events.
It is really just about reclaiming yourself 'Post BC' & finding what you are now happy to do & are able to do. It may not include things that you used to be able to do.
It could be something as simple as starting a 'new routine' - i.e. going to the library for one morning a week, to catch up on the latest magazines (instead of buying them!) Some libraries have coffee shops attached these days ....
It's a bugger, isn't it @Sister - it is amazing how this shitty disease continues to turn our lives (and our brains) upside down ..... After your treatment has finished .... are you able to negotiate a period of Long Service Leave (or Time off in Lieu of Payment) so that you DO have a period of time to recover not only physically but more so, mentally. Going straight back to work may be quite stressful and not be beneficial to you in the long term ...... but - if you feel you will be up to it ... Go Girl!
Doing 'new things' during this 'quiet' period would be a pathway to finding a new interests for you to move forward with .... whilst maintaining any of your current interests as well, of course.
Just give something 'new' a go - you never know - you may just love it!! ;)