Lolo Missed Period

I’ve been on birth control (Lo-lo) for four months now. The first two months I got my period right when I started the placebo pills.

The third month I missed my period. This month, the fourth month, I feel as if I won’t get my period again.

I tested w home pregnancy test after a week of missed period, and after two weeks.

Just wondering how common this is with Lo-lo birth control