No period....

I'm two days late. My lower back is killing me my lower tummy is sore too, my boobs are sore but no period and I'm not getting any sign of a second line. I had brown spotting mixed with stretchy mucus x vvvlight punk only when wiping 11 days ago. So would this actually make me late or am I due on this Sunday? Have I just tested early.

Does anyone have any advice as to what could be going on? It's impossible to get an appointment with my doctor, still not doing walk ins where I live 😑