Banana Smell Everywhere!

Can somebody explain this???

I ate a banana 4 nights ago, and I've been smelling banana ever since. Everywhere. Not only at home. It's a strong smell, and it's ALWAYS there. When I go to sleep and wake up and when I'm at uni and at the movies and even when I'm eating other foods, I'm smelling banana. All the time.

This is the third time this ever-present-smell thing has happened, and each time, it has involved banana - last time it lasted for about 6 days.
It's doing strange things for my memory too - am constantly remembering things that I did during the last 'episode' of all-present banana smell. I'm busy trying to enjoy myself now so that I'll have good memories for next time...
Btw, I've not had any traumatic events occur in my life involving a banana