Anaplasmosis is *not* lyme, but you can get it along with lyme since it is transmitted via tick bite. I think it is closely related to the tick-borne illness ehrlichiosis. I would recommend getting tested for those two, as well as other tick-borne coinfections such as babesia. They are definitely not included in your lyme western blot.
Also keep in mind that it is definitely possible to have lyme and yet test negative. The test checks for antibodies in your bloodstream, and if your body is not yet producing many (i.e., you were bitten very recently) or most of the antibodies are already attached to lyme pathogens, then you're less likely to get a positive. If you do test positive for a _different_ tick-borne infection, then it's likely that you have lyme as well.
If nothing comes up and the doctor won't treat you but you still have symptoms, consider going to a lyme expert. It's not a good thing to have undiagnosed for long...