Yellow fluid on a bandage is pretty normal. I get that all the time...if you're putting Neosporin on the cut sometimes that will cause some yellowing. And most cuts if they are kept moist will have a little bit of discharge I think....doesn't mean they are infected, it's just the body's way of healing. Keep an eye on it like moon said, but don't worry about it too much. I've cut for 2 1/2 years with not a single infection. As long as you take care of it after the fact, put anti-biotic cream on it and bandage...you should be fine.