I am the same way. I have my receipts sitting in a box in the dining room half done which is amazing since I make any excuse not to do them.
Find an accountant who has done daycare returns. They are pretty simple for them to do actually. Do the tallying yourself of your expenses. There is a government website which has info for daycare providers. An accountant will charge perhaps $150.00 for your return and you have piece of mind that it is done correctly.
Think of the monies you will have coming to you since you haven't filed your return in a couple years like child tax credit, GST rebates etc. as incentive to get those dreaded receipts done.