I think the biggest hurdle was simply the decision to go. I was just like you (and am also following in your footsteps of eventually receiving my doctoral degree in psychology) and I was (and am still) very anti-medication. I believe medications can work wonders for some, however, I do not believe I am one of those people. My decision to go came from just being tired of being so depressed and anxious. The lack of motivation and concentration, as you've said, is definitely the essentials in becoming and staying a good student. Once you lose those, what are you to do?

Going to therapy doesn't make you 'weak'. Is there a specific reason you're anti-therapy? There is nothing wrong with it. If your had a body pain, you'd go to the doctor, no questions asked. What's the difference with a mind pain? Emotional distress is something that CAN be treated, and something you can recover from, the same way with a broken bone. The quicker you get treatment, the better.

However, I did go to therapy before I really thought I needed it. I went because I knew 'something' was wrong but couldn't quite place it, and I wanted someone to fix 'whatever' was wrong with me. I think that was alright, so I got an idea of what therapy was like, but it did a lot of nothing for me. Eventually I stopped, then returned knowing what I wanted to fix and had the motivation to do it. Basically I just got fed up of not living the happy life I thought I should be living. What I'm saying to you is...give it a shot. Just a try. You obviously know something is wrong or you wouldn't be here. You may find solace in reading others accounts of therapy, the process, medications, etc etc. I think it's great you're seeking help, if not in therapy, then atleast here with us.

Good luck with everything and please let us know how it goes! PM me if you need anything.