Late period

I’m so frustrated!! My period was due 3 days ago and I haven’t gotten it yet. All I had was 2 days of light spotting (31st and a little bit on the 1st) I have bad back ache, acne, sore boobs, mood swings but NO period ????? I was on time the last 2 months so idk why this is happening. (No i haven’t had unprotected sex, we always use condoms and pull out combined) what causes this? Stress? Anxiety? Help😔