Clotting but no period ?

What does it mean when you only get blood clots during your period? Like I am not “bleeding” I only wear a panty liner because I pass blood clots now, usually only when I wipe or when I change the liner every morning so it’s very light. I have an appointment set up with my obgyn but not for a while, thought I should ask while I wait since it’s making me really nervous.

No chance of me being pregnant as I am not sexually active for the last year. I’m not on any birth control or anything. I thought

thought maybe something like Endometriosis or Pcos, but I don’t have any pain or cramps or anything so I am not sure. I am thinking of asking to have my levels checked as well. What do you guys think?