Period help, is this trick healthy?

Anna
I'm a 15 year old girl and for my age I do have heavy periods, for a while now I have been finding a nifty trick that can help ease how heavy my periods are, but I don't know whether it's healthy..
I used to hate my period so much I used to stick my finger up my vagina and gently scrape at its walls bellow the cervix to get blood out, I would then wash my finger and continue until I felt it was okay and then place a tampon in 
I have been doing this for over a year and I would like to know if this will effect anything later on in life like fertility and egg release please help!