I really don't understand what is going on with me I downloaded my fitness pal to help keep track of my calorie intake I weigh 145 lbs and consume 1200 calories a day walk just about every day on the treadmill burning 325 calories drink my 8 glasses of water sometimes more and I am gaining weight instead of loosing I am going crazy all my hard work and I get on the scale it goes up not down I get so frustrated and fell like my old habits at least I was staying the same weight a sample of my meals are
Breakfast egg whites with peppers tea
Dinner salad green low calorie dressing apple with peanut butter
Supper Chicken baked potato yogurt
I do not like a lot of vegetables so broccoli and other greens are not for me
can someone please offer some advice

How much weight have you gained? In what time frame?

Probably just water weight, weigh yourself in the morning before you eat or drink anything....and go to the bathroom if you have to!

Make sure you're standing on the scale right, stand up straight and don't look at the numbers changing.

How tall are you? 145p might be close to goal since you're not very heavy. The less you have to lose, the slower it comes off. If you're for sure eating 1,200 cals then maybe have to ramp up your exercise.

Be careful on your salt intake too, that will help retain water weight at most times. It sounds like you are doing everything right so just dont visit the weight scale so much cause that will make you paranoid. Make sure to throw a good portion of fiber in your diet.

Sorry thought I put my height in there I am 5 4 I have gained 1.9 lbs last week 2 weeks before that it was .8lbs and the week before that was 1.3 lbs about 4lbs in total my goal weight is 130 lbs

Hey! It sounds like you are doing everything right.
You can't trust the treadmill's gauge of how many calories you burn walking--figure about 43.5 net calories per mile above what you would have burned at rest--so like 150 calories for 3 miles--but other than that, you should be good.