Ask a Canada Law Question, Get an Answer ASAP!
There may be a possibility of you applying for permanent residency status in Canada. But that cannot be done because your child is Canadian and also cannot be done by way of spousal sponsorship because you are separated.
You can apply for permanent residency status just like anyone else can if you have the requisite grounds. For example, it may be possible for you to apply if you are a skilled worker.
Does that help as a starting point?