I did post here about the same anxiety before but nobody responded, probably because it was posted on July 4th. I have anxiety about catching rabies. 

In that first post, I had a muscle cramp on my right thigh and I mistook it for a bat bite. 

Well my mind is playing tricks on me and now I have been panicking for four days now, because I had drooled while sleeping four days ago and when I went to take a short nap, the blanket, still a bit wet from the drool; I mistook it for bat saliva and started panicking. It had gotten worse on the next day which I had confused a day which I woke up because I slept in a very uncomfortable position and I moved in the morning to sleep in a better position. I thought that moment there was a bat even though I didn't hear anything; I confused that day with the day this anxiety started.

Other flareups happened before, I had to go to the ER because I had a severe panic attack because I found two tiny swellings that were next to each other on my upper left arm and I thought I was bitten by a bat. 

I live in California (Northern California, in the SF Bay Area).