Confused

Hi so im using the premama fertility powder for 2 weeks now and while taking it my supposed to be my ovulation week turns into period week. Is it normal? Because the first time i used this fertility mix i get pregnant after a week using it… but before i knew i was pregnant i got period Im seeing in my calendar i should be getting my period at the end of the week this month. As what im saying i have period now and it says in my calendar this week should be my ovulation week. I just finish my period last month which is i have 11 days apart and now i have period again.