Tailbone Pain....

Hey,

So im currently 15DPO (due today) havent POAS because im willing to wait (toooo many disappointments) - anyway i have no PMS symptoms. zero pregnancy symptoms. but i have this incredible ache in my tailbone..

i had a smear test 2 weeks ago. could it be that? or is it a pregnancy sign? or something else.!?

thankyou