SO Sorry to see you both joining us here, @koalalala and @caitblack ... but you've found the best place for support from those who fully understand what you are going thru, as we've been thru it too.
You can use the 'search' function to check out specific terms ... (click on 'NEWEST' in the 'sort by' function.)
I was lucky & my BC was found 'early' and was small enough not to require chemo - so didn't need the test done re having chemo or not. If your Onc has suggested Oncotype dx testing, maybe it is because it is more accurate? Have you had surgery/biopsy that indicates what Stage your BC is, or as @strongcoffee has asked, your KI67 score, @koalalala? You can read up a bit about it - @Julez1958 has explained it in easy English ... here: https://onlinenetwork.bcna.org.au/discussion/comment/225035
In the meantime, check out this post that has a lot of info on the forum & different areas you may like to explore - your art & craft, garden, furkids - we even have some funny bits, to give you a laugh when you need it!
Down the bottom, is a link to some 'tick sheets' where you can 'self assess' your physical & mental recovery as you go along xx Sometimes it is easier to print off the sheets & fill them in for your 'team' than to talk about it ;)
https://onlinenetwork.bcna.org.au/discussion/23477/a-big-welcome-to-all-new-online-network-members#latesttake care & all the best with your decision making