Blazed-Kitty,
This is not my area but you might find this video helpful. NurseKris might see this and chime in as well.
https://www.youtube.com/watch?v=tKVDvVVCPlQ
If you can't get it an after hours clinic may be an option aside from the ER. You have a home care nurse who comes don't you? You could give the agency a call.