When will the flu go away??? How long does it usually last?

My oldest son 13 came down with the flu last Thursday. Took him to the doctor Friday morning and the flu was confirmed. NOT the stomach flu. He ran a fever of at least 103.5-105 F up to today making it 5 days! My youngest son 10 came down with it last Friday making it 4 days for him so far. I haven't taken him to the doctor because I'm pretty positive it's the flu also and the doctor didn't do anything for my oldest son except give him prescription Ibuprofen and Tamiflu. I called the doc trying to get Tamiflu for my youngest, but can't get ahold of him. Now it's too late to take that. I started symptoms on Saturday, not much of a fever, but body aches, sore throat and coughing. My youngest just woke up with a 104 F fever. I have been giving them Ibuprofen every 6 hours and Tylenol every 2 hours to bring down the fever along with lukewarm showers. I feel like crap, but have to tend to them. How much longer can I expect this to last? Any other advice to speed up this "getting well" process? I have been keeping them hydrated with water, sugar free gatorade, sprite, etc...What more can I do? How much longer? Why me? Should I contact the doctor again?