Hand, Foot and Mouth disease is from the Coxsackie virus, and like other viruses (e.g. chicken pox, shingles, etc.) it is contagious and has to “run its course” for your body to develop enough antibodies to fight it off. You’re not allowed to work in order to avoid spreading it to others, and the acetaminophen is for pain relief. These types of viruses are usually described as being more painful for adults than kids. I’m not sure if antiviral medications that are used when a person has a herpes outbreak will help with coxsackie.
I have not had it myself. A friend quarantined her self and her kids last week because one of them had recently been exposed, but thus far they haven’t caught it. My son had it when he was three (20 years ago) and he had numerous, really bad sores – like dozens of canker sores – in his mouth and throat, but he never really got it on his hands; and thankfully, neither his father nor I got it.
I hope you’re feeling better soon. Try to enjoy the down time!