If it is H1N1, make sure you try hard to stay hydrated. It takes about a week to really start feeling back to "normal". You will be contagious until you have been fever free for 24-48 hours so try to avoid going out until then. I do know several people who have developed secondary infections as a result of having the H1N1. If you feel you are, call your doctor--GP or Pulmonologist. They will want to see you. You may need extra asthma meRAB or additional antibiotics. Stress can really wear your body down and make you more suspectible to picking things up too. Fever reducers are also recommended. You need to be fever-free without the fever reducers before you resume work though.
I have a great Pulmonologist. After about 1 1/2 years with him, he has given me standing prescriptions for antibiotics, sterioRAB and stronger strength Advair to fill on my own so I can begin treating myself immediately if I start getting bad. He said he will see me anytime, but why waste the money if I can begin treating myself first. He does want to see my if things get worse though.
My GP is good about getting me in quickly also. They know the routine with me pretty well.
CDC has some good information on the H1N1. The CDC and most local health departments have statements that recommend employers allow employees to be off until they are fever free for 24-48 hours without a doctor's note. It isn't enforcable though, just a recommendation. If you work somewhere that qualifies to require FMLA, you could talk to your employer about what you can do to get signed up. FMLA protects your job for up to 12 weeks of leave when you, a spouse or dependant is sick, have a new baby or adoption, or have a military spouse who was injured. The doctor will need to fill out the paperwork, but it might be worth it. Brand new FMLA laws recommend that people go on FMLA if they miss more than 3 days sick. (FMLA and CDC aren't matching with regarRAB to the leave since it takes longer than 3 days to get better from the H1N1.)
I have FMLA for my asthma and for my IBS. I use it intermitently. During the winter, I have asthma flares with the cold air and nasty inversions and air pollution. Makes some mornings rough for my asthma.
Hope you feel better soon.