Extreme desires for specific things.

For years, I will frequently and randomly develope an extreme desire for a specific thing, anything from a certain person to potato chips. I will go into an almost paranoid daze in which I cannot focus, make conversation, answer questions, or feel like I can do anything until I get the specific thing. It ranges from simply not being able to focus, to me crying. Sometimes I feel like I will explode, or that I am trapped inside my body and mind, and the only thing that will make me feel better is this specific item. The feeling of throwing up sometimes occurs. I has anxiety and moderate depression, but this has been occurring for as long as I can remember, and has progressively gotten worse and occurs more frequently.