My doctor says I can't return to work but an independent doctor says I can. I still feel symptoms and know i cant return to work yet.

You should never feel forced back to work against your own doctors recommendations.
Ultimately, your doctor should clearly communicate to your insurer that you are not yet fit to return to work. If your insurer still pushes you against doctors recommendations, or threatens your benefits, give us a call ASAP and we will help (our number is below)

You can also read more about your rights on returning to work here -https://stlawyers.ca/disability-law/faq/return-to-work-long-term-disability/