To be honest, you don't have any of the signs or symptoms of CRPS, particularly the basic criterion of persisting pain pain that is out of all proportion to the injury. There are strict diagnostic guidelines which set out the circumstances in which a diagnosis can be reached and it can only be done after every other possible diagnosis has been ruled out. The doctor who you say "suggested" it might be nerve damage or RSD at the point he did has no basis to reach that opinion unless you have lots of other clinical signs and symptoms that you left out of your summary. Unfortunately it seems that CRPS is increasingly being used as a dumping ground diagnosis when people have pain but their doctors have no idea what is wrong with them. The clinical diagnostic criteria are pretty detailed and what you have described doesn't fit them at all.

From what you have described, it sounds nothing like CRPS. To be honest, it sounds like the normal healing process for a broken toe which has had a delayed or less than ideal healing protocol applied. With broken bones, even toes, the normal recovery and post recovery pain can be quite significant and can persist for quite a long time afterwards especially if you have had delayed or inappropriate treatment - such as not immobilising or keeping walking on it. It's entirely normal to have stiffness after a broken bone, especially after a period of immobilisation. The initial impact could also have caused soft tissue damage which is notoriously painful and slow to heal but also often missed. Even something clinically insignificant like bruising the end of a bone can cause 6-9 months of pain - it just takes a long time to fully heal.

Like many others have advised, I think you should stop worrying about CRPS and just crack on with your normal life. Anxiety and worrying about a condition that its really unlikely you have, isn't going to do anything to help you - it will become more of a problem than your toe.