I'm having trouble sleeping

I'm having trouble sleeping. Part of it is definitely my fault. I've identified that if I eat piles of sugar (i.e. a cookie or two) before bed, I will fall into a 2 hour coma. This is not restful sleep.  Then I'll wake up and have trouble falling and staying asleep the rest of the night. Yet, I do it anyway. I think I just get tired of being awake with nothing to do honestly.

The other part of this is not really having that drive home from work. So my work problems stay with me through the night. I don't have a good separator.

Last night's ruminations were concerning an email from a co-worker. Other people are so good at "clarifying" their thoughts, i.e. correcting others. But for me, I think it reads as defensive and unnecessary, so I don't do it. But I really want to. That's really it. 

I'm tired of feeling like I'm told one thing and then when it comes time to act, people act like they have no idea what I'm talking about. Or worse, that I have no idea what I'm talking about. This is troubling. 

So do I respond to this person or not? I had given myself 3 months to observe before I started the "clap-back" as the young folks say. I might just have to keep biting my tongue until then.   On further thought, I think that's a good exercise in discernment - gathering all the facts.  

But this is at the risk of getting overlooked, talked over, and viewed as incompetent. I guess I have to choose my own path. I'm already feeling the dread.