Help?

Me & my husband have been ttc for 7 months.. I’m 2 days Away from expected period and these last 3-4 days I’ve been having very very light blood mixed with CM, ive only noticed it after I’ve checked my cervix, and the one time it was in my underwear while at work.... I’ve never even showed signs of starting my period before it came, so I’m very confused 😩😩