4 days late for my period?

Okay well im 18 dpo an ive been spotting off an on an its stayed a light pinkish to light brown color an ive had this clear CM whenever the spotting would stop? Well i had lk 45 mins ago an i just went to the bathroom lk 15 mins ago an i had 2 tiny blood clots with just a little bit of light spotting? Well i just checked again an theres nothing cept the lightish pink spotting? none of this stuff is leaking out its all staying inside of me.. Whats goin on is this my period or what? This is really unusal for me!