Implantation or Ovulation? HALP!

Soooooooooooo my period began 4/16 and ended 4/20. THEN on 4/26 (my sons first birthday) I went to use the bathroom and spotted pink/dark pink blood when I wiped and inserted a tampon. I was also having mild cramps for about an hour. Once the cramps ended I took out my tampon and it was clean! I know that it's too soon to be considered inplantation bleeding but I have NEVER spotted between periods and I have very regular 30 day cycle. Has anyone gotten pregnant RIGHT after your period due to early ovulation? Or does this sound more like ovulation bleeding?