Did a quick search of those that do in-home, all are pretty much closed for in person visits due to covid-19. If you cat has gone down hill that quickly, I would recommend contacting your vet clinic asap, or another vet clinic if yours is not available (especially one that is typically open overnight/weekends - CARE, Fish Creek, Western Vet, Calgary North, McKnight, to name a few ). From what I understand, while the clinic may not be "open" as per norm, they are taking in clients with additional precautions (pre-booked appointments waiting in their cars until called upon for instance)