hard time with sickness

My son is almost 7 months. He's had 4 ear infections, a few colds, and now has strep and yeast on his booty from the antibiotics for the ears. We can't catch a break 😩 he stays home with me besides the few hours a day I go to the gym where he goes to the daycare they have there. I just feel so bad for him! We wash everything so well but he puts everything in his mouth that he touches. I know it's just the age but any other mommas going through this?