Emjtaylor, you are not a failure.
You've lost 4 lbs, that's great!! So you had a slip-up.. you know, that happens sometimes, and it's okay. No need to make yourself feel awful about it because that's just going to, well, feel awful right

Consider why you decided to have some ice cream and alcohol... maybe there is something you can learn from the experience

We all have slip-ups, even the people who meet their goal and learn to maintain... the main point is, that we get back on track right after the slip-up. Some ice cream and alcohol on one night is just some ice cream and alcohol on one night

In order to gain one lb, you need to consume 3500 calories MORE above what you need daily to maintain your weight (not how much you're getting to lose it, cause that's less). So to have gain 4 pounds, you would have needed to get 14,000 extra calories above your maintenance from the ice cream and wine

Take heart, you'll be okay

, just make sure you get back on track and go after those goals! because they are just waiting for you!!!
Why do you want to reach your goal? How will you feel when you do?
Remind yourself of that, think about it more than anything else, and hopefully that will help you hop back on the weight-loss wagon