Bloodwork was within normal except platelet count of 411(range 150-400) my pcp appointment is in a month but so afraid of heart/stroke i read on line?

Stop worrying: Just relax, there is no risk until you get into the 700,000s or so and that is when it's neoplastic. Reference ranges are set so that a few percent of healthies fall outside on either end. Don't give this another thought.

Depends: If you are healthy otherwise, I won't lose sleep over a slightly elevated platelet count- which can be elevated simply by having the blood drawn right after exercise. However if you do have blood clot issues, then it may be worthwhile to repeat the test in another month (no exercise for at least an hour prior).