Sorry haven't had that happen to me - I did experience some spotting just before my period would have been due, cramping and bloating, however spotting was not red. Could be the start of your period - or perhaps you ovulated later in the month then you think (doesn't always happen when you think even regular cycle) so it is possible it was too early to tell on a home pregnancy test when you took it. It's really just a matter of the waiting game, waiting for AF to show up or for a positive pregnancy test. If the spotting doesn't get heavier, try taking a preg test first thing in the morning with the first urine of the day (if pregnant your HCG levels are higher at this time). Sorry I can't be more help.