Could lack of calories/carbs make me wake up early?

[CommitmentRulz]

OP, a 'drink' and junk food is adding much more than 200 calories a day. This makes me question ALL of your day's calorie counts. If you're underestimating that badly on the weekends, you're likely under estimating everywhere.

Sounds like you need a new weight program (novice) with a written/defined progression scheme.

[TolerantLactose]

My original point from earlier stands.

When your understanding of your own question is so poor that the answer will be well beyond comprehending, your point doesn't really stand.

[LittleIronGirl]

While diet can play a part in sleep quality, given the lack of change in your weight in two years, it is very likely that there are miscalculations going on. It could be that your weekends are actually significantly higher in calories than your weekdays and so it cancels out the deficit you've created on weekdays. Otherwise, it could just be miscalculations in general so make sure you are weighing your food in grams and tracking every little thing. If you see find out that are eating 1700 on weekdays but your weekends are significantly higher, I would recommend keeping a consistent calorie intake daily that is sustainable and help you sleep better (e.g. 2000 daily is better than 1700 on some days but then binging/indulging on other days).

Working out at night and/or taking pre-workout can affect your sleep too. Try only taking pre-workout when you really need it and see if that helps at all. If you don't feel good without it, perhaps train before work or change two of your lifting days to weekends so you can train earlier.

Your diet/workout may not even be the cause of your sleep disturbances. It could be stress or other unrelated factors, but you can at least rule them out.