No appetite anymore, losing weight without meaning to.?

So for the last 3 weeks are so I just haven't been enjoying food. The only thing I like to eat are chips and deli sandwiches which I only eat ever so often. Foods that never used to bother me are now torture to scarf down. I literally gag eating something that a month ago I might have even enjoyed. I already dislike broccoli but usually I can easily get it down with milk. I tried to eat some the other day and I just couldn't. As soon as it was in my mouth I began gagging and spit it up involuntarily. About a month ago I weighed 101, I know weigh 94. I am 5'4. What could this be? Is it worth going to the doctors for (I hate the doctors).
No appetite anymore, losing weight without meaning to.?
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