This sounds very similar to my daughter's hemangioma, (she's 5 now) almost exactly the same. I'm not sure about who to see for a doctor in Canada, but I'm sure other Canadians will chime in here. But from what I've read on here, I think you should be pretty pro-active in advocating for your son, starting right now.
If you wan to see pics of my daughter's lip please send me an email: email@example.com
. She ended up doing really well, but she did require some treatment. I also have twins too, believe it or not! They are almost 2. They were born at 35 weeks and both have hemangiomas, one very minor and one that was much bigger. So if you'd like to chat about having twins too, email me! Sounds like we have a lot in common!