Losing Motivation, Blaming Things on Anxiety?

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Hey /adv/,
I have a problem, hope you guys could point me in the right direction. I seem to lose motivation very fast, what can I do to hold on to motivation? Sometimes I feel like i'm lazy a lot of the time, and I'm not sure how to get my head into the "Come on, time to get shit done and work hard" kind of mode?

I seem to be pointing my finger to "It's not me, I must just have depression or anxiety", The problem is that I don't know if I still am suffering from my previous anxiety attacks and depressions i've had previously, I use to be suicidal, that's how serious it was.(I don't have suicidal thoughts now.)

I just want to figure out what the fuck is wrong with me because I want to achieve and be so successful, and I feel like this is a roadblock I am at. A very difficult one if you ask me, I recently graduated High School, and not sure of what I want to do in life.