When will all the sickness go away?

Generally we are a healthy family. Until today, neither of my girls have ever taken antibiotics. Dimetapp cures most all their ailments. This week Becca had an eye infection and we just got home from the doctor again and Bridget has strep throat. Schaun has his own issues and has been taking antibiotics and pain pills since January. I have not slept a solid 7 or 8 hours in so long that I cannot recall.