Hello I need help you know how you get your period every month I think I missed mine last month can fingering cause that I dont do it anymore?

No. Many factors can change and effect your period. If semen gets near or in the vagina this can lead to pregnancy which can cause a missed period. If you are just doing " fingering" this will not cause a pregnancy. Changes in hormones, stress, medical conditions, malnutrition,....can all effect your period. Follow up with a doctor to figure out why you are not getting period.