Depression and anxiety from swallowing

Patient: Hi. I think i have a serious mental problem. Last week I was sitting in class when I had a really loud swallow. I wondered if others could hear it. The rest of the class i examined my swallow. Eventually I just became obsessed. Now it is all i can think about. Ever two seconds i find i need to swallow forcibly. It is making me depressed and ruining my life because i can’t concentrate on anything else except my swallow and in class in gets really bad because i tense up making it so loud people actually look at me with weird faces. Im so scared and annoyed at this normal bodily function. Please help!