Hello, I had unprotected sex the day after my last period Jan 8th. I can always tell when I ovulate with cramping and thick mucus discharge. I didn't have that kind of discharge this time but I have been extra wet. I use a calendar app for my cycle and ovulation but its never on those dates. my partner has history of low sperm count but I know ive always been very fertile, with 3 kids. I took a home pregnancy test yesterday and was negative. I cramped a little and spotting after intercourse on 15th. Im nervous if it was implantation spotting. I would appreciate your advice. :)