Hello! I don't know what it is related to! I started my period delay a…

Hello! I don't know what it is related to! I started my period delay and the doctor said to take a test, if there is a visible spotting, she said wait! Yesterday on day 3 of delay from 5 am to 10 am I had nothing (I was on the road, going to a wedding), so when I went to the toilet I saw blood (it was abundant, very watery blood) closer to noon it became less blood, today even less and still two spots are visible. Yesterday I felt nauseous, couldn't sleep at night, ovaries were hurting, and there was an impression that everything was numb. Since morning I also felt nauseous. Question, what could this be?