Brown discharge after sex. Date is due?

Hello Doctor, I am tracking my periods on Flo app. Having irregular menstrual cycle and right now the average cycle length is 23 days. I had my last periods on 13th june to 17th june. And according to Flo app my ovulating day was 22nd june that is on 9th day from my first day of period. I had unprotected sex on that day. My husband did not ejaculate in me but before 2nd round he did not pee. Also I had some spotting red when he fingered me before intercoarse. My period day due on 7th July but after having sex last on 28th june, I am having brown spotting on every day. Some day a very tiny clotts are there too. Is that a early pregnancy sign? Or just cause my period date is due?  I am not having any other pregnancy symptoms.