What sort of symptoms would make you think about chronic Lyme disease?

Lyme. Scientifically, despite the attorney general of connecticut, it is not at all clear that chronic lyme disease exists.
Many symptoms. Lyme is called the great imitator because it can cause virtually any symptom. The most common symptoms are joint pains that can affect many different joints (& move from joint to joint), fatigue, problems with memory & concentration, trouble finding the right word, variable vision & numbness in hands &/or feet. See http://www.Huffingtonpost.Com/leo-galland-md/lyme-disease-symptoms_b_876096.Html.