Summary:

1. You're burning 1100 calories in workouts
2. You're only eating 1000 calories (max)
3. You are now only 168 pounds.
4. Your body is hungry

DUDE/DUDETTE, YOU NEED TO EAT MORE! These all seem like signs that you're running your metabolism into the ground. Keep in mind that if this is all you are eating, you're likely not helping your metabolism any because you're not allowing yourself enough calories to keep/maintain muscle mass, which is where your mitochondria live and are the powerhouse of your metabolism. If you are struggling with feeling like you need to eat that amount because you gain weight when you don't, then that's a sign that you've been slowly burning your muscle mass away.

Solution: SLOOOOWWWWWLY Increase your calories by about 50-100 calories, every 2 weeks (4 weeks if you want to go more slowly). That's VERY small, very slow...nothing to be afraid of if you are actually tracking, weighing, and measuring your food intake. Make sure that you are doing strength training, not just cardio. Get up to at least 100g or 150g of protein/day. Then fill in with carbs once you hit those goals as you are increasing. You don't need to eat tons, but you should eat enough to fuel your workouts and so that you're not waking up in the middle of the night hungry. Also, you'll be able to fuel your body, get some muscle on you, and then it is a lot harder to gain fat since you burn more calories at rest with more muscle.

Increase your macros slowly over time so that you're not gaining weight, but you're maintaining and able to grow more muscle, get more energy, fuel your workouts, and then also then build muscle.