Keep an eye on it but I wouldn't panic too much yet.
Try and get hold of some manuka honey in the meantime, have it either with lemon juice and hot water or just eat it as it is. It's great for soothing sore throats and coughs, and it's also a really strong antibacterial (as in, hospitals are now using it to fight MRSA!) so it can help infections.
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We are a fever, we are a fever, we ain't born typical...