Can implantation happen 2 weeks before period?

Yes. You ovulate 2 wks before your period, if you get pregnant during that cycle implantation occurs 3 days after the fertilization.
Implantation. Ovulation, the release of the egg from the ovary typically occurs approximately 14 days before the onset of menstruation. Fertilization of the egg will typically occur, if it occurs, within the 24 hour period after ovulation. Only after fertilization occurs will the egg implant. The journey from the point of fertilization to the implantation site can take 7-14 days.
Yes. Ovu;lation occurs 2 weeks before a period starts. Fertilization 1-2 days later, and implantation 1-2 days after that.