Does anyone else get just one sore nipple from time to time? My left nipple has it's sore days for no reason I can find. Like today, I just noticed whilst walking around it feels sore and when DD is feeding it's hurting a bit. I've checked the latched and relatched her when it hurt quite a bit so I was extra sure she was latched correctly. I don't know why some days it hurts on that side. Anyone else?