Period late by 8 days

Hello everyone! This is my first post here. In fact I registered today.

We are planning to TTC but haven't started it seriously yet though we did have unprotected sex once and app shows I ovulated that day.

We haven't started charting anything yet so I'm not 100% sure that I ovulated.

So now, I had the feeling that my af is about to start and wore a pad right away when I was due i.e 30th. For 3 days the same sensation continued where I had brown spotting overnight and creamy cm day time.

It's 8 days past my due date. Still got the same feeling. 2 bfns so far.

Symptoms include bloated, gassy, backache, leg and vag cramps. I feel uncomfortable the whole day!

Is there a chance I am pregnant? Or is it a very late or missed period?