implantation bleeding?

Hey guys! We're TTC for number 2! Bad part is when I had gotten pregnant with my daughter she was a surprise I didn't find out about until 12 weeks. I'm right in the middle of my ovulation cycle according to the app. My grandma was a labor and delivery nurse for 30 years and swears by the "10th day from the first day of your period is ovulation". We've had sex every day in hopes of conceiving.