First Cycle... Help

So I just had my first post partum cycle. The 27th-2nd. Baby is almost 7 months old.

Had sex on the 1st and it was unprotected and he came in me.

Yesterday and today I've had spotting.yesterday was just streaking when i wiped and pink or brown in color. Today it was red. Not enough for a pad. Only when i wipeed and it has dwindled down this afternoon and now stopped.

But..

Ive never had this before... What the heck is this wacky stuff.

And according to this app today is ovulation day.