Got mastitis (red, sore breast, hot and cold spells and aches) last week, and spent the morning queuing at the doctor's to get the antibiotics. Then, a day before I am due to finish the course, I have it in the other breast! DS is 10mths, so why am I getting it now? Only thing I can think of that set off the first bout was that DS stopped feeding at night for about 2 days - even then I expressed off the excess at about 10pm that day. Then maybe I favoured that breast over the last week to try and clear it up?? I have only had it once before at around 4mths. I work about 3 days a week and express once while I'm away from home, but usually DS feeds about twice in the day. Do I need to get DS checked out in case he is carrying some sort of bug???