I ca'nt even bring myslef to reply what I want to this topic. Now your looking up things on the internet to find things that matches your symptoms. I'm not believing this!
Here I am with all sorts of illness and you are healthy wanting to be sick!

Alex- the weight loss might be a concern- but it's probably because you're so anxious that you're having a hard time keeping weight.

You don't have cancer. Please don't look your symptoms up on the internet!! For someone with the anxiety problems you have, it will only make you worse.

Your doctor said it was anxiety, right? Trust her/him.

calm down
no you dont have cancer
your fine

Personally it would be my conculsion that the reason why you may be loosing weight is because your to busy looking for something to be wrong with you which is making you sick and not able to eat which is called anxiety,

Which symptoms in particular make you think you have cancer?

By the way, losing 15lbs in 4 months isn't drastic weight loss. I lost 15lbs in six weeks once, and I didn't have a serious illness.