I don't have any problems with the structure of my heart or heart disease nor do i take stimulants. what could be causing my increase in pvcs? :/

Arrhythmia: You may not have any heart structural problems but you may have a problem with the nerves supplying your heart muscle. This is a different issue. If this has not been evaluated, it needs to be. Also, have problems like thyroid dysfunction been ruled out? If no, they need to. For the evaluation of the heart conductive system, event monitoring is used. Talk to your primary care doc or cardiologist.