Let me tell you of my own little problem.. that I had in my teens for a couple of years until I learnt how to handle it.... Hope I won't sound too crazy here...
I had to count the number of letters in every word that I said or thought. I guess it started out like a little game or something, and then I couldn't stop. All the time the secret counting of letters was going on in my head. It made everything more complicated and I had problem concentrating and doing other things because (7) I (1) just (4) could (5) not (3) stop (4) ! As if that wasn't stupid enough I had to complicate things. I also had to count the total number of letters in sentences. (49). But the worst was that sometimes I had to make sure the the total number of letters were even. If they weren't, I had to change several words in the sentence and count again.
A simple task such as brushing my teeth in the morning could take 30 minutes, as thoughts popped up in my head and I just stood there, looking at myself in the mirror and counting.
I (1) should (6) put (3) my (2) gym (3) clothes (7) in (2) the (3) bag (3) for (3) school (6). (39) ODD.
I (1) have (4) to (2) remember (8) to (2) take (4) my (2) gym (3) clothes (7) to (2) school (6). (41) ODD. ARGH!
I (1) must (4) remember (8) to (2) bring (5) my (2) gym (3) clothes (7) for (3) school (6) today (5). (46) EVEN!
I did this ALL THE TIME. Actually it became even more complicated later on, but I think I'll stop here.
Eventually I realised that this was a big problem for me, a big, stupid problem that made my life complicated for absolutely no sane reason at all and it had to stop. Every time I started counting I just said "SLUTA!" (stop!) and I went and did something else to take my mind off it. It was difficult, the counting started without me thinking about it, and I had to make a conscious effort to stop it. thankfully the problem went away, and now I'm almost sane. 
I had to count the number of letters in every word that I said or thought. I guess it started out like a little game or something, and then I couldn't stop. All the time the secret counting of letters was going on in my head. It made everything more complicated and I had problem concentrating and doing other things because (7) I (1) just (4) could (5) not (3) stop (4) ! As if that wasn't stupid enough I had to complicate things. I also had to count the total number of letters in sentences. (49). But the worst was that sometimes I had to make sure the the total number of letters were even. If they weren't, I had to change several words in the sentence and count again.
A simple task such as brushing my teeth in the morning could take 30 minutes, as thoughts popped up in my head and I just stood there, looking at myself in the mirror and counting.
I (1) should (6) put (3) my (2) gym (3) clothes (7) in (2) the (3) bag (3) for (3) school (6). (39) ODD.
I (1) have (4) to (2) remember (8) to (2) take (4) my (2) gym (3) clothes (7) to (2) school (6). (41) ODD. ARGH!
I (1) must (4) remember (8) to (2) bring (5) my (2) gym (3) clothes (7) for (3) school (6) today (5). (46) EVEN!
I did this ALL THE TIME. Actually it became even more complicated later on, but I think I'll stop here.

