My daughter had lyme disease twice. Both times she presented in a way that the doctors did not completely agree were symptoms. Both times she had it. First was hives, circular rash that would come and go and flu symptoms. She also had sharp pains at the base of her head. The first time they took the bloodwork, they did not interpret it right. Since she kept having symptoms I went back and then it showed but I went to an infectious disease specialist. Several years later she was lethargic and achy and the doctor thought it was hormones or mono. My gut said lyme and I was right. Go with your gut and if you can find an infectious disease doctor, try that route.
p.s. Don't lymph nodes swell when one is fighting an infection?
I am not a doctor, but it does sound like Lymes Disease. Textbook actually. Either way, when one doctor's answer does not satisfy you, go to the next. Some doctors have their own agendas. Make your own.
I was recently tested for lyme because of some of my symptoms and I'm guessing that is what is wrong with me. I get the same neuro symptoms you describe. IT is starting to actualy affect my work. I know a pretty good deal of information about lymes....granted I'm no expert though....to know that 2 weeks is not nearly enough time to be on the Doxy. It is also too low of a dose.
My suggestion would be to find another doc...preferably one that specializes in lyme asap! My MIL battled with chronic disseminated lyme for several years and I researched a good amount of info on it. I have an appointment with one but that isn't until several weeks from now but I strongly urge you to seek out a LLMD (lyme literate MD).
Good luck!