The cipro & doxy should definitely have killed anything bacterial and you’ve already done more than any doctor would have. That cipro is one bad ass antibiotic.
The buzzing thing is funny because I’ve experienced it also in the past. The first time it happened I thought something was wrong with me also and I too started to freak out on myself a bit. But I’m 100% certain that both I and my partner are “clean” in every sense of the word. Interesting indeed that you guys have taken it to possibly being plaque buildup in a artery or blood vessel. Since I’ve experienced it quite a few times, I figured maybe it was some sort of muscle spasm? I’ve also notice that even good ole’ gas in the lower intestines has caused the same sensations. I don’t worry about it too much anymore. Heck even masturbating with dirty hands can cause problems, so wash them first dummies.
My advice: In this case do what the doctors do, use the process of elimination;
Chlamydia, Gonorrhea, and Syphilis are completely rampant in the USA. Particularly throat infections cause by these viruses and bacteria, so even receiving head can be problematic these days. If you haven’t been playing in any questionable sand boxes lately, then don’t worry about it. IF you have (read prostitutes) then maybe you should take a second look your behavior as well. However you’ve already taken enough antibiotics to kill a horse so you should be free and clear … this time. I don’t mean to chastise anyone publicly, but I’ve watched several friends die from Aids and Hepatitis C as a result of foolish behavior. Absolutely no one “deserves” it. So just take what applies and file the rest.
Ruling the above out, it’s source is probably nothing of concern and more than likely can be considered normal.
Hey now that I think about it, when I first started doing kegels was when I noticed the “buzzing” for the first time. Hmmm, maybe something was waking up.