Is it normal to rarely have periods?
I've been tracking my period for a while now, and I've realised that even though I seemed to have had a regular rhythm when I first started, the past few years I've only had 3 periods a year that last about 2-3 days. This year, I've only had one period (which was back in May) and it's September now. Is this normal, or should I get it checked out?
EDIT: As for my health and the like, I'm under 20, haven't lost a lot of weight and i'm definitely not pregnant or on birth control. I do have a few mental health issues (depression, anxiety, psychosis) that could cause stress, but these have existed prior to my periods becoming this bad.