Ovulation or Implantation Bleeding

Seiconies • Loving mom and wife.... Enjoy life
I was to start my cycle on the 16th and  I started seeing a pinkish like discharge on the 14th and then started bleeding on the 15th! Now my boobs are starting to feel a little tender and I'm very nauseous...there isn't anything that's helping with the nausea! Can anyone explain to me what's going on here?