You've been sick for more than a day?
Antibiotics are prescribed at times in patients with cotton fever, if the fever persists. But it's best to let the fever run it's course anyways so I don't think you'll have to worry about going to the hospital unless your symptoms get worse.
One remedy is to take a hot shower or lay in a hot bath to combat the shaking/fever. Take your choice of Aspirin, Tylenol, Ibuprofen, etc for the fever and the pain associated with cotton fever. If you're in pain at all.
What exactly are your symptoms? Most people feel better after eight hours, as it usually only lasts a couple hours. Rarely will it turn into something more serious, such as pneumonia, but there's still a possibility so you aren't in the clear yet.
I'd also be concerned with the wellbeing of your child. Don't use dirty cotton filters, old syringes, anything dirty or contaminated, really. And if you're pregnant, don't use it all.
Make an update regarding how you feel. Don't be afraid of going to the hospital, they're there to help you, not get you in trouble.