Relax. Take your meds and lie down for a while and this delusion will pass.
Plague has been around for a long time and is under control. It is spread primarily by rats carrying fleas. Large outbreaks in the absence of rats are unknown. Hence, pest control is the key to prevention.
Almost every year someone with the plague enters the USA, usually from Mexico, where plague is more common than in the USA. There are also natural reservoirs of the organism in various wildlife species. These are dealt with in a non-panic, rational way by public health authorities. Even Mexico, where plague is far more common than in the USA, does not have a serious problem with it.