Cardio for weightloss Questions

I haven't been much of an exercise fanatic but as of the New Year I have been pushing myself.
I have been pushing for 50mins + of cardio and min of 3 classes per week (30 min ab buster, Pilates)  and Now I'm beat (tired - a walking zombie) I can't sleep but I'm exhausted.  How long till I get past this feeling? (1000-1300 cal. intake)
I've also gain a pound so thats moving in the wrong direction. I need to lose weigh. Approx. how long does it take to see the scale move in the right direction?
I'm part of a weight loss challenge and I really want to lose some weight. My $10 is on the line - I don't want to lose my money - Jk
Help - I need some input or answers, anything, Help

I'm including this from yesterday - I was so hungry all day I over ate but this is an exception not the rule.

Food Name Amount Unit Cals Fat (g) Carbs (g) Prot (g) Delete     Total 1,470 87.3 60.5 119.1   Cabot Reduced Fat Cheese 1 serving 50 3.5 1.0 6.0   Creamy Cilantro Dressing 1 serving 100 10.0 2.0 1.0   Fage Total 0% Yogurt 1 serving 90 0.0 7.0 15.0   Mixed salad greens, raw 1 cup, shredded or chopped 9 0.1 1.8 0.8   Beef steak 2 oz, boneless, cooked 143 8.5 0.0 15.5   Cheese, Cheddar or American type 0.25 cup 101 8.0 1.4 5.9   Peanut butter 2 tablespoon 188 16.1 6.3 8.0   Wasa Crisp n Light 7 grain crackerbread 1 serving 60 0.0 13.0 2.0   Bacon cheeseburger, 1/4 lb meat, with tomato and/or catsup, ... 0.5 (1/4 lb) bacon cheeseburger 390 21.8 22.5 24.7   Peanuts 0.25 cup 219 19.2 5.6 10.2   Isopure premade drink 15 oz 120 0.0 0.0 30.0       Total 1,470 87.3 60.5 119.1

Make sure your iron and B12 levels are good.  They make a big difference in the tiredness feeling.

You probably need more food, not less.  I take in around 1800 or so cal/day to maintain.

Newer exercisers often gain weight from increased water retention in the muscles from working them harder as well as muscle-building.  You can't get discouraged so quickly or its totally counterproductive.

Look at exercise as a way to keep your heart and body healthy.  Losing weight is just an added bonus.  The commitment is to health, not necessarily to weight. loss.

Linn