If you make sure you scrape off all the visible mould and throw that away, then make sure you wash your hands/container/knife etc. Give it another smell, see if it's better. As long as it doesn't smell too bad after this, it should be fine. I frequently eat cheese and butter that has developed a little bit of mould. The key is in the smell/taste. If you really can't palate the food then that is your body's natural way of saying its no good. If the smell is fine and it tastes ok, then the chances of it causing you too much trouble is small. This does not go for things like raw meat/yoghurt though. These are things you need to be real careful with.