Ready to Cry

I have been working out for about an hour every week day for the last week and 1/2 for almost an hour a day but I haven't lost a pound, actually the scale says that I gained a pound. I am so very frustrated. I really want to lose the weight, I don't want to look like this anymore. I don't know what I am doing wrong. I do yoga and 30 minutes of cardio one day and strength training and 30 minutes of cardio the other day. I am so very disappointed.