Missed periods with mini pill

Mackenzie • Baby boy born 9/6/18 & 1/18/21 💙💙

I gave birth to my son last September and have been breast feeding since, so my period didn’t return until he was six months old. I have been on the progesterone only mini-pill since a few weeks after his birth. My period came normally until June. June was the last period I had. It seems my cycle has suddenly disappeared. I’ve taken pregnancy tests and they are negative, but something feels off. Has anyone completely lost their period with a mini-pill?