Am I lacking some kind of nutrient?

I don't see anything logged in your diary, can you give us an idea of what your diet is like? Maybe try to log the last couple of days so you can see if your macronutrient ratios look ok?

You're running low on Vitamin Get-Up-and-Go.

If you're craving chocolate, magnesium could be the problem, but it could also just be that you're a sugar addict. Haha. I definitely am!
I know it sounds counter productive but you could also up your fat content....when I say fat, I mean healthy fats. Nuts, fish, avocado. I have found that eating more fats definitely keeps my hunger at bay, and I am no where near as hungry as the previous time I tried to lose weight on low fat and calorie counting (tha failed miserably )

From the diary entry you posted it does look fairly well balanced. 1400 is a reasonable calorie restriction. Maybe try increasing to 1500 and see if you feel any better? Also I do notice there isn't a lot of calcium in that diary entry. I only go on about calcium because like I said I was very deficient in it, and feel much better since I have more. If none of this works, maybe go and see a dr. It's normal to feel a little drained at the beginning because you're cutting calories out, but after a week or two you should settle into it.

Good luck!

It's hard to tell from a simple list of foods you're eating, so one thing to consider (in addition to advice above) is whether you're getting enough protein. I'd suggest shooting for 0.6-0.8g per pound of goal weight, at least. More is OK, if you're healthy.

If you have an active job, your calorie level may be insufficient. If you're losing more than 2 pounds a week, add more calories. In fact, since you have not a huge amount to lose, and you're hungry/tired, considering adding calories if you're losing more than a pound a week.

If you're just starting out losing, you may have an adjustment period where you feel hungry (couple of weeks) even if you're getting good nutrition. Tired is a different story, and more concerning.

One option would be to start your calorie level at maintenance (estimated level where you'd neither gain nor lose) for a 2-3 weeks. If you lose, the calculators are underestimating your calorie needs. If you don't lose, cut your calories by 100-200 per day, then monitor for another 2-3 weeks or so. Keep doing that until you find the point that seems comfortable, sustainable, and achievable, and eat at that level.

Yes, this would be slow, but I'm sure the extra weight wasn't gained quickly. In order to lose it successfully, you'll need to do something that keeps you feeling good and functioning well while you lose, over a long period of time. Otherwise, there'll be a bigger risk of falling into cycles of craving and overeating.

Hoping you find a workable balance!

i just take a good multivitamin to cover my lows if any.

Since you've had your blood work tested, you are active and your calories are in range for a sedentary person, I have two ideas. You may be eating too little or you may be depressed.

Try some healthy fats in your diet. I don't see any there. Like a tablespoon of coconut oil or some nuts. Fats make you feel full longer than carbs for the same calories.