MR. BMJ said:
I've had it 2-3 times.
Make sure to keep hydrated by drinking a lot of fluids.
It will be hard to keep much of anything down, or from being blown out your arsehole, so do your best in that regard.
Good luck bro. Sometimes a script for Bactrim helps. You should be better in 2-5 days though.
The best thing to do if it gets really bad, although expensive, is to go to the hospital and have them keep you on I.V.'s.
BMJ