How Is This Possible?!!

Ok I weighed myself Sunday and much to my horror and disgust, I found that I gained not only the 3 lbs I lost two weeks ago but I also gained another three lbs on top of that. What the hell is going on? I've been working out religiously for five days a week for two weeks now, at the very least I expected to lose as least 1lb. So today I am not going to work out, instead I'm going to do some research to find out why this happened. Please don't tell me it's muscle, I don't need any more muscle. All I want to do is lose this fat I gained and fit back into my clothes. I am so upset I almost want to quit.