Late period

I need some help😅 I normally am like 3/4 days late. Never more.. if I don’t start today or tomorrow I won’t have a period for the month of November. I have NEVER (since I got of birth control 1 year 1/2 ago) not had a period in a month. I’ve always had a period that ranged from 5-6 days. I’ve had a little bit of cramps but nothing like I usually have. I’ll probably cramp a few times and then it just disappeared. I normally cramp really bad. My boobs are somewhat sore. I could’ve swore I was gonna start my period, but it just never came. I have an appointment with an gynecologist on the 7th of December and honestly i have no clue what to say to them😅 I’ve took two pregnancy tests a week ago and to my looking they looked negative. Could I possibly be pregnant and still get the negatives? Should I be concerned? Below is pictures of my period tracker and the average and the last few months.