Agitation, easily distracted, mood swings, depression, rage, irritability, over-sensitivity, racing thoughts are symptoms of bipolar disorder. I've had all of these symptoms since 14 (now 49). (I'm pretty sure I'm agitated depressive ie. mixed manic. I've had every diagnosis since 1986.)

I had one semester in college where I had lots of difficulty taking tests (easily distracted): arm-to-arm w/125 people in classroom, people coughing, dropping books, turning pages. Everything became amplified and I would lose my train of thought. I got two Ds, two Fs that semester. Next semester I took leave of absence. I've also had lots of trouble socializing since onset. It's literally like lifting weights, my baseline mental energy just doesn't work correctly. And lose my train of thought while talking, etc.

I have not found anything to ease my agitation/irritability. I'm sensitive to anti-psychotics (prescribed for agitation) or I do not respond to them. I have responded to ritalin and adderall but they wear off fast. (I also responded well to paxil 1996-2000 but also wore off). My Doc said some agitated BP people become relaxed with stimulants like ritalin, etc. and that's what it did for me for a while.

I might get a second opinion if I were you.