Yep. I had endocarditis a couple of years ago. No warning, just slightly lowered energy levels, then a sudden bout of gout. After going to the doctor I got some meds for the gout but the pain increased and progressed to a lung infection. That got worse for a couple of days then suddenly oral thrush. Big "Oh no" energy, so I drove to the emergency room. I walked in, taking four stops along the way to catch my breath on a 100m walk, then once in the ER I had a doctor listen to my left lung, expression of concern, right lung, deepenitg concern, then worst heart, definite oh shit moment.

I had Streptococcus Sanguinus, a typical oral bacteria, in my Aortic valve. It has eaten the valve until it was back flowing by 75%, so I needed four pumps to match one normal pump.

They said the source was probably biting my cheek, ADHD comes with lots of benefits, so yeah, not a virulent or particularly dangerous bacteria, just in the wrong place. Got the valve replaced, now I am on Warfarin for the rest of my life, but wow, I am glad to be in Australia, the only money I spent was on snacks. I was flown to and from hospital, 6 weeks in hospital, surgery with 11 staff, and not a single solitary cent spent.