Is platelet count 412 high if so what causes it n is it really high or mild?

Majority of labs have the upper limit at 450K, which will make your count normal. However, clinical context and trends if available are best in making recommendations regarding isolated lab values and your doc will be best to comment in your clinical context.

Iron deficiency from menstrual blood loss is a common cause of elevated platelet counts. Your count per se is not of concern but you may benefit from taking oral iron and multivitamins. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV vaccine.