Our family doc is an LLMD. Like, the kind that has a waiting list that spans up to a year. She generally only accepts patients that are referred by other patients, at this point, she's in very high demand.
One doesn't end up with the family doc being a renowned LLMD unless Lyme has severely impacted a family...
So here goes:
DH has had acute Lyme, and been adequately treated, at least twice over the years. It might actually be more than that, as he's been preventatively treated several times.
DS had Lyme at about 3 years old, was treated adequately, and enjoyed an almost ten year break. We were extremely cautious, and watched like a hawk for any signs that his treatment was inadequate. Last summer he had Lyme again, along with babesiosis and viral meningitis. Courtesy of ticks.
I am just a perpetual soup of TBDs, sadly, though I seem to have been in remission now for a lot of years. Knock on wood. Though I was preventatively treated after a tick bite last summer (adult male deer tick, embedded, in a Lyme endemic area, in a Lyme patient with a daunting history of TBDs).
My LLMD has contracted Lyme multiple times, and treated it, and contracted it again (she is active outside, and is exposed to ticks regularly).
One can absolutely contract Lyme more than once, it's not like chicken pox or some other illnesses, we don't develop antibodies to it that stick around. Plus, there are many, many strains.
Did you see the second tick? I do sometimes wonder if a second round of Lyme could be that the first round wasn't adequately treated. When was the first round of Lyme? Any symptoms between then and now? Was it a full recovery? Were co-infections treated?