After how many months without periods do you see a doctor?

Hello ! I'm 26 (any pronouns are alright) and have been diagnosed relatively recently with PCOS. I am (and have always been) very irregular, which is why I didn't realize I had an issue until asking my doctor once when they'd finally stabilize... I have moments where it will go "normally" for a few months, then it stops and come back a while later... Or is completely chaotic for a while (generally when my body decides to go high in testosterone for a bit, for funsies). And everytime I have a very long cycle I wonder if I should see the doctor or not, or when I should... To give an idea my last period was end of november...

My belly hurts but it's probably just digestive issues (probable IBS). And I can already say that I'm not pregnant, I don't do the necessary acts (ace/aro). As one of my issues is the hormones going through the roof, I am a bit worried about getting on the pill... But I'm beginning to think that it will be necessary (particularly since they always are far more painful when I miss them... I am going to suffer when they come back ah ah)