Spotting ,brown, dark brown spotting

So my period was March 26 till the 30th , since then I’ve been spotting which I know is normal . Fertile week was April 5th till the 11th the light red spotting turned to light brown spotting . The day 9th before ovulation day the spotting stopped and on ovulation day (10th ) spotting returned very light brown with a few sharp cramp like pains but went away the 11th dark brown discharge returned and today the 12tg I have pink discharge. Idk know what this is or if it’s normal to spot that long, period isn’t due till the 24th this month . Btw I’ve had sex since I’m trying to conceive my 4th baby for 4months . Please ; does anyone know what could be going on ?