I'd recommend not taking the acetaminophen if you drank the two 40s anytime in the recent past. If you had them within five days, the two could interact. I read on Go Ask Alice, which is run by Columbia University that alcohol could interact with acetaminophen taken as long as 5 days after you drink. If you drink heavily on a regular basis (or even moderately perhaps), it might not be a good idea to take the acetaminophen. As little as 3 drinks a day could be enough for the two medications to interact. Plus, the interaction between acetaminophen and alcohol can be extremely dangerous. The interaction has been known to cause serious liver damage that can occur rapidly. As someone who drinks quite heavily on a regular basis, I simply don't take acetaminophen. If you are sick enough to need medical attention, definitely do go to a doctor or walk in clinic as opposed to taking the pills. It is possible that you did get the flu from the doctor's office, but that's very difficult to say one way or another. So, this speculation shouldn't influence your decision as to whether or not to see a doctor.