Many, many years ago – my Saturday lunch consisted of a sausage sandwich (don’t ask why). On one particular Saturday, the sandwich tasted unbelievable salty. The following day I went down with flu – I realised that for some reason, my impending illness had heightened my sensitivity to salt. I suspect you have a similar issue with the taste receptors on your tongue – and something similarly amiss with your olfactory organ. I would recommend you book an appointment with your GP, if only to confirm the symptoms are temporary – and if not, medical intervention can be arranged at the earliest opportunity.