I agree with Mel! And I love her quote in her signature. I think 20lbs is GREAT!
My first week of Weight Watchers, I GAINED 3lbs! The next three weeks afterwards, I flip-flopped between gaining half a pound and losing half a pound. And I did the program perfectly all four weeks. Who knows what caused the weight gain and weird fluctations. But then this past week, I lost 6lbs. Our bodies are real funny that way. And I say 1.5lbs is no big deal! It could be water (resturant food is LOADED with sodium!!) or maybe you weighed in when you had food in your stomach or were bloated. Being bloated can make me APPEAR to gain about 5lbs at the end of the day. It could be anything and you may surprise yourself at your next weigh-in.
If you're working out alot, especially with strength training, you're bound to gain some or stay level because you're gaining muscle. I certainly don't use the scale as my only predictor of my success. Those numbers are tricky little devils.
I also go by measurements, how I feel, how my clothes fit and oddly enough, how much farther away from my steering wheel I'm getting! Silly I know, but it helps when I get in and see my stomach is a few more inches away from it. It's a good feeling and reinforces my weight loss everytime I look down. You can come up with your own gauges too.
Everyday is new day. Heck, every hour is new hour. So you have a fattening lunch. You have half the day left. So you eat "badly" all day long. It's one day. If you eat bad all week, accept your choices and the outcome and begin a new week with a fresh slate. Forget the gain, it doesn't matter. Weight loss is NOT linear and we all gain when we don't understand how or why as well as situations like yours where we didn't make healthy choices.
It's not very motivating to see the scale say you gained, but look at the big picture of your successes in your journey to good health that have nothing to do with numbers. Have you weeded out junk food? Sugary drinks? Have you had better water intake? Do you make more good choices than bad? Etc, etc. Write them down and stick them on the fridge if you need to so you can look at how well you're doing everytime you reach for food or drinks. That, to me, is just as motivating as numbers when I see in black and white what kind of change I'm capable of and how far along the path I really am, despite what the scale says.
I've only lost 30lbs in 6 months, but I've made SO many great changes to my attitude and my lifestyle that I feel the slow (and sometimes unsteady) loss is worth it as no journey that ever reaches its destination starts out at full steam. You are bound to run out of fuel fast! I mean, 1lb per week is still 52lbs in a year and 104 in two years. That time will pass wether you lose weight or not, so you might as well make the best of it. That notion has helped me greatly. I'd rather spend three years losing weight than to lose 30 years off my life because my weight caused me to die young. And at my current weight, that is very possible.
Here is some

to help you get back on track
Some of these

to cheer you up
And a toast to your successes and victories and all that will most certainly come to you in the near future
