I was diagnosed and treated for purported Lyme disease for 2.5 years. Did I ever have Lyme? Who knows. I had one Commercial test say I was negative. Criticism says those tests lack sensitivity. I had another Igenix test show me floridly positive. That test is criticized for being overly sensitive and lacking in specificity. So what should I have done?
Well, this was my reasoning. I've had my symptoms for at least 16 years now (at the time of my treatment it was about 12 years). Been to several various doctors. Only diagnoses I could get were mental health ones, which are not valid medical entities. But I had tried various treatments for them, both medications and talking/behavioral therapies. I was only getting worse. My symptoms also seemed to vary minimally as a result of my emotional state whereas they varied greatly with changes in the weather (e.g. feeling more rotten when it's raining and intense brain fog and muscle tightening during humid weather), suggesting to me an organic source of some form or another. My symptoms are also highly disabling. I was aware that prolonged antibiotic treatment has questionable efficacy and there are risks involved. But a cost-benefit analysis suggested to me it was still worth the risk. Did it work? Well, it did seem to greatly improve some of the gastrointestinal issues I had been having for years, but the far more disabling neurological and cognitive problems did not improve, unfortunately.
So my advice to you would be, in the absence of diagnostic certainty, try to be rational about it, at least. Ask yourself:
Do you live in a Lyme-endemic area? Did you spend a fair amount of time outdoors and in nature prior to developing your symptoms?
Was there an obvious psychological trigger to your symptoms? Do you experience any symptoms other than DP/DR? What is their nature (be as specific as possible)? What factors, if any, result in a fluctuation of your symptoms?
How disabling are your symptoms to your life? Would the potential for improvement be worth the considerable resources it would take to undergo treatment for suspected Lyme?
Feel free to send a private message to me if you wish to discuss further.