Do I have some kind of learning disorder or something?!

So, as long as around, I've had trouble with focusing on something for very long. I'm in college and it gets really hard for me because I'm only taking 10 credits and I can't seem to focus on what I'm reading. Sometimes, I read the same sentence probably four to five times because I can't focus directly on it. I get really frustrated frequently and I am incredibly impatient.