DD (6 mos) has a raging temperature of 39. It went down to 38 with Calpol and Neurofen but was still too high and she still seemed very unwell. It also bounced back higher again very quickly. Should I take her to the GP? She may be teething or have caught her dad's cold but in neither case in the past with her or DS have I experienced Calpol etc not working so wondering if something else? There aren't any other obvious symptoms but she is lethargic and very sleepy.