Could I have a type of OCD?

I'm pretty sure I might not, but I'm just wondering. Every time I hear a word, like shave for example, I have to start saying words that begin with SH. It's not just SH, but a lot of words. Also if hear or see someone scratch anything, I have to start scratching the nearest thing to me. My food CANNOT touch, if it does i have to throw it away. If I start writing something & even if the slightest thing is messed up, like the A isn't in line with the other letters, or I don't like the way I wrote it, I will just crumble up the paper and trow it away, even it's in pencil.