So confused....

Jessica • TTC # 1
So last night DH and I did the baby dance and after I had 1 small spot of pinkish blood when going to the bathroom. It was not rough at all...I'm on CD 19. I got a positive OPK on CD 7 and again on CD 17. Is it possible I ovulated twice and maybe this was implantation bleeding? When I got up this morning I felt very dizzy which is unusual.