Period 13 days late

My period is 13 days late, on cd 42 now, I had cramping in my back on the 1st of June lasting a few days and I’ve had it on and off since, my boobs did feel sore better they feel a bit better now, my cervix is super high I can’t even feel which I usually can, it’s never been that high before I also have heavy milky discharge(tmi lol) and I’ve had bfn since before missed period, did a test today and it was negative, I have been pregnant before and ovulated the day my period was due so I didn’t test positive till 18 days late but never had no symptoms apart from no period. I have pcos and endometriosis and I’m getting sooo fed up now and I’m pretty sure the doctors are fed up with me ringing them up crying and asking for help, pcos sucks! I absolutely hate it, if it was a person I would have killed them by now 😂😂😂 but in all honesty it sucks!!!