It sounds like you have high cortisol at night which is why your energy is higher late in the day. High cortisol at night will keep you awake so look into supplements and diet to lower your cortisol level. You might see if you can get a 24 hour cortisol test done as they can be very helpful. I take the supplement Seriphos to lower my cortisol level, and it really helped me sleep.

The other thing I've found very helpful with my insomnia is taking more magnesium as low magnesium causes insomnia. You need to take calcium, vitamin D3 and K along with the magnesium as they all work together. Be sure and take a form of magnesium that is more absorbable such as magnesium chloride, citrate or malate. DON'T take magnesium oxide as it passes through your system causing little more than raging diarrhea as it can't be absorbed.

Magnesium and Seriphos are the two things that have enabled me to be able to sleep on a regular basis.

If you're on meds, research if they deplete your magnesium levels as most meds and processed foods do.