Something smells gross...?

A few days ago, I started smelling a strange smell. I thought it was my marmasets. I washed all 72 of them, but it didn't go away! Then I realized that maybe it could possibly be my iguana. I bathed him a few times but it was still there. Then, I went to visit my daughter and she has no pets or kidlets so I figured I wouldn't smell the stink there. Well, I was way wrong! It followed me! Does anyone know what could possibly smell so badly? It kind of smells like a mixture of mayo and oytsers and eggs. Help!