Should food taste disgusting 5 days after septorhinoplasty?

When I first woke up from surgery I ate some cookies, sandwiches and had lots of tea which tasted a little duller than usual but not so bad. Now five days after surgery I can't eat anything because it all tastes really gone off and putrid to the point where it makes me gag to eat. I can't even go into my kitchen because the faintest smell of food smells so evil it makes me feel sick. I know dull taste must be normal but everything smells and tastes so, so bad. What do I do? :(