my period started literally right now..

I'm so upset.. I'm currently 17 TTC.

me and my fiance talked through it, we made this choice together.

but anyways my mother isnt ok with me wanting to get pregnant she feels I wont get the future I want. which I know I will. but anyways this month I told her about us TTC and she was excited I guess to be a grandmother , but now I started my period and I want to try again next month but everytime I'm TTC she stresses... which she shouldnt!!