never ate exercise calories, now I want to..

You will inevitably lose less weight than you were previously, you are now eating more calories. That isn't a bad thing though, especially if you are close to your goal.

1200 calories a day is very low, I don't know what your weight, height etc are but I would recommend you put your numbers into a calorie calculator (one linked below) and see how many calories you should be eating day to day. I dare say you are hungry because you have been undereating for quite a while and as you get thinner your body will fight you harder to eat more. Heavily under eating is not healthy but isn't really a big problem until you drop to a more natural body weight as your body can use your fat stores for energy during times of negative calorie intake. Once you get thinner though your body is trying to fight off starvation and will send signals throughout your body telling you to eat more.

I would put your numbers into a calorie calculator like the one linked below and just see what your BMR and TDEE are roughly and gauge how many calories you should be consuming. You can set this to 'desk job with little exercise' to gauge roughly how many calories you need day to day doing no exercise and then you can eat back your exercise calories. I gauge roughly how much exercise I do and input 'moderate exercise' instead of desk job and eat that many calories day to day, rather than methodically logging my exercise as such but either way works. You should always be eating above the number it gives you for your BMR. The number it gives you for your TDEE tells you how many calories you can eat at your current age/weight/height and neither gain or lose weight. Anything below this number will result in weight loss, whether it is averaged out or whether you eat more on your workout days and less on non-workout days.

I hope this helps but simply put if you are hungry I would recommend you need to eat more.

http://scoobysworkshop.com/accurate-calorie-calculator/

I don't have much weight left to lose.... I want to change and start eating my exercise calories.... Will this huge change start making me stall weight loss wise? Or gain?

First, if you're close to maintenance then your goal should be set to .5 lb. per month. Second, everybody's different, and weight loss takes a whole lot of trial & error.

Start by eating back half your exercise calories for a few weeks. If you don't plateau, start eating back 75% of your exercise calories. If you're still losing after a couple of weeks, start eating back all your exercise calories.

(Maintenance will work the same way: change your goal, then fine tune to find the calorie intake at which your weight stabilizes.)

Congratulations on nearing your goal!

I think you have really good advice so far. Personally, I'd make sure you know how much you want to lose from your diet alone, and that will determine your weight loss that way you can distinguish between your weight loss goals and energy goals separately. It just makes life a lot easier and organized that way. If you factor both your diet and inconsistent workouts, it will make your total calorie intake much less accurate and you constantly have to make changes all over the place. that is not a good way to optimize.

I just want to add one last time to make sure you consume good carbs. before your workout and some after. That's IMPORTANT since you're concerned with a lack of energy during workouts right? Carbs. produce the "fastest" amount of energy in the shortest amount of time, through glycolysis, but it will take a few hours for your body to digest after you eat. Wait too long you will deplete your main source of energy (carbs.), cause your blood sugar to drop and begin to burn fat for energy. Worst case scenario, you'd break down muscle if you're already at an extremely low body fat % like togmo mentioned, especially during workouts. --> That is why you feel groggy and get a lactic acid burn in your muscles a lot sooner, you're body is reverting to an alternate pathway for energy that you don't want. So just consuming anything available will not necessarily do the trick.