My DS has been on antibiotics since Friday for an ear infecion. He is 12 months and this is his first time being on antibiotics. He has had diarrea for almost two weeks. The day after we started him on the antibiotics he started to get a mild diaper rash and we have treated to continually with ointment. Well, this afternoon the diaper rash got terribly worse. It is all over his bottom and on his private too. When I used the wipe to clean the poop, a few spots on the skin started to bleed. He is in serious pain and cannot get comfortable. I gave him some motrin and put more ointment on his bottom. Should I be concerned?