I got the flu (not throwing up, though), an upper respiratory infection, a sinus infection and a UTI all at the same time at about 28 weeks. The main thing is to make sure you drink enough fluids (that could be what caused my UTI) and monitor your fever to make sure it doesn't elevate to 102 degrees or higher. You can take Tylenol to keep it down. If you get dehydrated or cannot hold anything down for several hours, call your doctor and go to the ER where they will do an IV of fluids. Other than that, there's not much they can do for the flu.