Lmp 18.1.14 sex 2.2.15, 36 days cycle, ovulated 9.2.15. had light bleeding 12 to 16 of feb. i wasnt due until the 23rd. could this be implantation bl?

Timing is a bit off.: After fertilization, the fertilized egg travels slowly along the fallopian tube to the uterus. It usually arrives in the uterus about 6 days after conception and completes implantation by 12 days. It's possible that you're experiencing implantation bleeding, but it's a bit early. If you don't get your period on the 23rd, you should do a pregnancy test.