Started my diet Wednesday... not lost any weight for 2 days!

Weight loss is not linear, you will not see a straight downward trend. Also, with the amount of weight you want to lose (about 25-30 lbs right?) a rate of loss of 1 lb or 0.5 kilo/week is appropriate. Losing more rapidly can result in loss of lean body mass, fatigue, and in general is not sustainable. Additionally you may not have to go as low as 1200 cals to lose weight.

I'm sorry for your loss and admire your commitment for health to try again for another baby. Rapidly losing weight isn't necessarily a formula for health - you want to make sure you're getting adequate nutrition and taking care of your body so that you will be healthy and strong when you become pregnant again.

Best of luck and take some time to read the stickied most helpful forum posts at the top of the getting started section - you'll probably find a lot of good info there.

I’m sorry for your loss.

Please reconsider your approach. A moderate calorie deficit monitored with a food diary over time will facilitate weight loss. It really does work. Add in some activity and make modest adjustments when needed.

If you read this board much, you will see that most folks wreck themselves over the time issue.
The fact is, if you want to make it, you need to be different from most folks.

Crunch some numbers, start a food diary and set up a weigh in system that gets you off the weight loss merri-go-round. You need a livable plan, a cool head and determination. Speed is the way to crash and burn. Don’t.

Here is why I would recommend you aim for slower weight loss: I set my goal for losing two pounds a week. I was eating 1200 calories a day, plus the exercise calories MFP said I’d earned. It was too aggressive! I lost 30 pounds in a short period of time, and along the way I also lost some muscle mass, especially in my arms. This despite the fact I added some weight lifting to my routine. I was eating healthier food, but I started losing a lot of hair! This despite the fact I started taking vitamins. So, if your goal is to be healthier, slow down! You will want your body to be as strong and healthy as possible.

What everyone else is saying. It's better to lose slower and develop better habits that will serve you well once you phase into maintenance. It's a lifestyle change. I lose weight on 1800 calories, though some of that is because I'm tall and fairly active. 1200 isn't enough for me and I feel cranky and unwell, meaning I give up a lot quicker and go back to old habits.