If you tried to avoid hitting another vehicle, it does not sound like careless driving to me, however I am not the one you need to convince.
Careless is a hard charge for the prosecution to prove, so most likely if you showed up for a trial, they would offer you a reduced charge. But we need to see the disclosure first before we can really know if you have a good defence or not.
+++ This is not legal advice, only my opinion +++
I would definately follow jsherk's advice and see the disclosure.
Mind you Bloor does not have a high speed limit so to 'spin out' you likely were doing more than a 'bit' over the speed limit - unless it was wet or icy perhaps.
Former Ontario Police Officer. Advice will become less relevant as the time goes by !