I agree with tickertock....you're going to make yourself sick with worry!! Four (4) pvcs in a row is not a big deal. Remember, in a normal heart, a run of pvcs is no more significant than a single pvc.
I know pvcs are frustrating. But, they are not going to kill you. I've had pvcs for 25 years, singles, couplets, triplets, salvos, bigeminy, you name it....and I'll probably always have them. Some days/weeks/months/years are better; others are worse.