Nausea after colonoscopy

Had a colonoscopy a week ago today and since then I've been having mild nausea after I eat anything. (Small things, like a banana, not large meals.) Unfortunately it's not giving me an aversion to eating in the first place, more like a punishment for ingesting food!

I don't know if it's related or if this is just the new status quo...

My only problem with it is that it doesn't' seem to work well enough anymore! There's a first time for everything though... does it normally last this long?