I went to the er with major chest pains and my blood pressure was 200 over 105 i sometimes have high blood pressure but that day i smoked meth it's been two days and at random my chest will hurt all over again and my pulse will go really hi to lo qui?

Methamphetamine causes blood vessels to constrict and spasm such that your blood pressure dangerously spikes. Then heart attacks can occur or strokes can occur which can be subsequently very debilitating to you or even deadly. With symptoms still occuring, you should have your heart examined by a physician for damage to it. And of course, the best for your your body is to never use again.