Originally Posted by DoulaLC
It may not be a "false" negative, it may just be that a positive hasn't been picked up yet. Since it can be quite easy to miss ovulation when trying for a particular date, it can be helpful to start trying several days before you think ovulation will occur and right through to a few days afterwards. This will give you better odds of having the sperm present when an egg is released as the egg is only viable for a short period of time.
See what happens with your period.....you may have gotten lucky this cycle....good luck!