Insomnia & ADHD in Undergrad/Pre-med?

Hi everyone,

It's about time I share something that I knew about myself and also, something that I have discovered recently...

Since I came to Canada (about 6 years ago), I've had insomnia. In fact, my circadian rhythm is so messed up - I fall asleep at 4, but then I have to wake up early; but even if I don't have to wake up early, I still do. Basically, on average 4-5 hours of sleep.
To some people, it may seem normal, but sleep is very important for concentration - something which I already naturally lack.
So, to solve this issue - I use Melatonin; a natural hormone which regulates circadian rhythm. This summer though, I will try to exercise (and terminate Melatonin) and see if I have any improvements of my insomnia.

Speaking of concentration...I have ADHD. I know that a lot of people might have suspected it, but I myself started suspecting it in grade 12 - in my math class. That class was where a single tiny mistake will lead to the loss of grades, and since there are so many small nuances to it, I kind often got it wrong. For example, I'd switch a + and a -, or some number with another number.
Once again, it might seem like nothing, and "everyone does that", but I did those mistakes ALL THE TIME.
I would also not be able to concentrate on math for more than an hour, but our class is 2.5hrs.
Long-story-short, even my teacher (who, I think, is the best) told me to go get checked for ADHD. I didn't...

So having completed my first year at university, I mostly struggled with problems related exactly to ADHD - decreased concentration towards details, and lower performance in timed conditions.
As for the other part of ADHD, hyperactivity, I am very grateful for that. Only because of hyperactivity I am able to stay energized and motivated all the time, even with insomnia. I also found myself being creative.

Below, I'll list my symptoms, and I'll also list some weird observations:
Disadvantages
1. decreased concentration for prolonged periods of time
2. almost uncontrollable inattention to details (most of the time, but not always)
3. shift of focus
Advantageous (I think) symptoms
4. constant hyperactivity and energy; hyperfocus periods
5. endless drive and motivation
6. creativity
Also...
7. I don't procrastinate that much
8. I do fully complete the tasks once I've started them

I would like to also mention that I do not have anxiety, so my inattention is not due to that. I don't get overstressed on almost anything, but I am hyperactive.

The most interesting part - what am I gonna do with my ADHD?
I just got diagnosed in April 2017, and my doctor suggested trying the medications for improved focus. I'll start it mid-August, and I'll be letting you guys know how I'm doing.
To be very honest, having lived so long without knowing that I have ADHD, and now discovering it and going on medication is difficult, and I judge myself for that a lot. I know, lots of you are going to judge as well... but try to understand that something that you naturally have (required levels of certain neurotransmitters) - I lack; so I'm just bringing it to the norm :)