I just joined and my last time that I had my. It was actually an miscarriage was on 9-12-2014

Sierra
For some reason the application will not let me sexy put in my date ease and I keep on deleting all the days it says I've had my period because I have not had one since 9-12-2014!!! I keep on deleting all of the periods that it says that I'm having and then I hit save so it won't go there and it doesn't work can someone please let me know how to fix this!? Thanks