I'm a 34-year old with essential thrombocythemia. since i am still low risk for blood clots, what are natural ways to lower my platelet count?

There are none: Essential thrombocythemia is a real disease and one for which the best treatment is to do nothing. Any "nature doctor" who offers you a non-evidence-based nostrum is doing less for you than someone who simply urges you not to treat a lab value. By the way, in the young, the thrombocytosis if iron deficiency can be mistaken for ET. Do you have a JAK2 mutation? Your physician is your best guide.