Withdrawl from bcp or pregnant?

I was taking the generic Sprintec (ortho cyclen) for about a year. I starting taking it as a Sunday start. I took my last active blue pill on November 10th and began my period on the 11th. My boyfriend and I have been using the pull out method since then and on the 20th he didn't pull out. Since then I have had mild, but pretty constant cramps, nausea and headaches. The nausea ususally comes when I don't eat right away or with sensitivity to certain scents. The last few days I've had an increase in milky cm. Is it too soon for these to be pregnancy symptoms? It's only the 2nd of December. If on a regular cycle still my period will be due the 9th. I know that just coming off birth control it's hard to know when I'd be ovulating. Do these sound like withdrawl from the pill or pregnancy? I started having the nausea, headaches and cramping within the week of the 20th.

Thanks in advance for any advice or information!