It is good that you informed the police right away about the theft. That is the first and most important step to take.
Hopefully, you have photocopies of your documents. A sensible thing to do with your identification is to photocopy or write down all the details of the credit cards, SIN card number, medical plan details and driver’s licence details and keep at least two copies safely at home.
After you call the police, you should then call up the toll-free numbers on your credit card statements and inform them about the theft.
You will need to reapply for your social insurance number and your driver’s licence. Also, contact your bank to report the theft, assuming your bank cards were in your wallet as well. Especially if you have high-value assets, such as a house, you need to let the bank know that someone is out there possibly trying to use your identification to apply for loans or mortgages.
Unfortunately, it is a terrible process to have to go through, but the quicker you deal with it the better off you will be.