I would contact ILADS or the Lyme Disease Association to locate a LLMD. If you have symptoms and positive bands (likely on IgG if the doctor said it was an "old infection"). You may very well have Lyme and need further treatment especially if you never had any treatment for Lyme in the past.
A LLMD will likely run tests through Igenex Labs for Lyme and co-infections and then depending on your preference you can decide whether to treat with combos of antibiotics, herbs, alternatives or a mixture.
Infectious disease doctors are notorious for dismissing Lyme cases and stating that you don't need further treatment despite the continuation of symptoms. Basically most of them believe that symptoms after 28 days of low dose doxy are psychological, untreatable or just "aches and pains due to daily living." Lyme doctors on the other hand believe that the continuation of symptoms is due to an active infection, and there have been many recent studies confirming this opinion.
So it basically comes down to what the individual patient believes. There are several good Lyme books that I found very helpful. Cure Unknown, The Lyme Disease Solution, Healing Lyme, and the documentary Under our Skin. They can help to explain some of the controversy as well as the scientific support of longer term Lyme treatment and chronic Lyme.