My DS (6.5 months) has a slight fever (37.9 degrees) and I'm not sure why. He doesn't appear to be sick (had his ears checked recently, no cold). He was difficult to settle last night and has been particularly whingy and sensitive this morning. I was just wondering if they can get a slight fever when teething or even if this sounds like teething. He's been dribbling and chomping for ages. When should I take him to the doctor with regards to the fever?