You're discouraged because you only lost 2 pounds in 4 days?
Beginner or not, it looks like your expectations are just too high. Are you changing your lifestyle, or just trying to lose pounds as fast as possible? If you're taking the latter approach, you'll never maintain your weight loss (assuming you reach your goal in the first place). Take a breath, slow down, and let the pounds come off at a reasonable pace. Quick weight loss is usually temporary weight loss.
By the way, 2 pounds is great, so please don't be discouraged!