Quick question, I’m super late for my period. I

Thought I ovulated late. I haven’t had any spotting besides a slight brown mark In my mucusy discharge the other night. And I haven’t had any since. It was one time when I wiped and since then I haven’t had any. Ive been wearing a pad and having slight cramping here and there with sore swollen boobs. They said at my ultrasound( I get check ups monthly due to my anxiety because I use to get huge cysts) said that I have no cysts just a 6.5 mm endometrium lining. I was just wondering if anyone has went through this before? I just don’t know what to think. I have an appointment tomorrow at my ob for a follow up appointment. I had a pap done last week and my results were perfect with nothing wrong. Also pee tests were all perfect no infections. So my question is how do I boost my period of it’s truly coming? Or could I have just ovulated at the end of the month?? Glow says I’m 9 days late.