I agree with Limbrizik.. Don't dump it until you try it. You need to be a lot more patient with the Brew.. The more times you open it, the higher the chances of infection. Also, sticking your head into a bucket of beer producing CO2 is going to smell terrible and sting your nostrils, especially at 4 days for a wit (which, like a hefeweizen, produces a lot of sulfur early on). Give it another week or two and don't think about it too much.
Also, make sure you control fermentation temperatures (not as critical for a wit). You should probably be fermenting most ales around 64-68F (liquid temp) which means the ambient air temp should be a few degrees lower. If you can't control that, put it in a bucket of water and add some frozen water bottles every 8 hours next time.