I also only had that discharge with ovulation, never with implantation.
That is a difficult question to answer. I always had that discharge after ovulation whether I had conceived or not. There really is no sure fire way to know if you are pregnant until you are far enough along to take a home pregnancy test...that is typically the day your period is missed. Good luck.
Usually it's very common to have white pasty or white/clear creamy discharge during early pregnancy....very possible.