Can this be PCOS?

I’ve had a regular period my entire life. I get it like clock work. I have PMDD so 9 days before each period I’m crazy emotional to say the least. Last period I had came on time but was a little lighter and shorter. For this cycle now I am officially 9 days late. I got mild symptoms I would get normally before getting my period like moodiness and breaking out but nothing compared to my typical PMDD. In fact I kept wondering when my PMDD symptoms would come. I haven’t had sex since my last period cause I’ve been stressed with a new job, and having to wake up 2-4 hours earlier, and also gross but I did get athletes foot so that stressed me out so much this month. I did have sex before my last period but I’ve taken tests this week which were all negative. I’ve never been late like this. People are saying it could be stress but I always have a stressful life lol and I’ve changed jobs before and my cycle wasn’t messed up. My biggest fear is having PCOS. I know irregular periods and missing a period is a huge symptom of that:( I’m not sure what is causing me to miss my period! I know I should go to a doctor and I have 2 appointments set up in the meantime though I just need a few opinions :( thank you!