I read your posting in the Lyme forum after randomly googling co-infection and crane beach.
I have exactly the same symptoms as yours and was leaving in Cambridge as well as went to Crane Beach before that!!!!!
I have been seeing a huge number of doctors who absolutely don't know what is going on.
Some of them tell me that it is psychological whereas I think I have been exposed to lots of diffcult situations and stress before without any health issue s I don't think it is psychological.
I started to get sick last year in the middle of October, about a month after trip to Crane Beach, at that time I was leaving in Cambridge, MA and was very healthy, never had any single health issue.
Then one day I became extremely tired and had heart palpitations along with joint pain and neck pain. It seemed to me that I had flu-like symptoms but then I never stopped experiencing joint and muscle pain, dizziness, confusion, muscle twitching and tilting, headaches.... It seems to go in cycles...
I have been tested for Lyme and it is negative.
I also took doxycycline which made things worse at the end of the treatment.
It has last for more than a year now and I was really wondering whether it was psychological or not.
After seeing your posting I just can't believe how similar your situation is.
Did you test for Lyme co-infections? Have you been bitten by a tick because I don't remember any, I only remember mosquitoes bites.
Have you been testes for Candida?
Sorry to ask you so many questions but it seems to me that maybe we could figure out something if we share our ideas on the disease andd how we could have gotten it.