Ok help me someone . possibly understand more math ? Too see if possibly preg...last period was 6 days long on march 20. Had sex day before ovulation on the 5 and about 8 times after that last time was the 15th. Past week ive been dead tired no matter what. Yesterday i started spotting brown. Today its still brown but more of it. Whats going on ? Is this a normal thing? Old blood i read but y if it was clear and done last month? Y tired ?

Is this early pregnancy?