can someone help?

AK
I've asked this probably 3 times now and I've got no response, hopefully if I keep asking someone will have some insight on it...
I have a positive ovulation test yesterday. Im not due for my period for another two weeks, and I started my period this morning. It's not spotting, it's about medium flow but not getting heavier. Anyone have any clue on this? My cycles are VERY regular.. 27-29 days.