My lmp was March 2nd and on Sat. Mar. 18 cd16 I had unprotected sex and he ejaculated inside of me...Sunday I took plan b around 4pm making it about 13hrs from the initial sex...this is where I was ignorant to how plan b works...this is only my second time using it ever but I thought it prevented you from ovulating so your ok throughout the rest of my cycle and enjoying the new sensation of unprotected sex we honestly had sex every night from cd 17 to cd 26. On cd 19 2 days after taking plan b I had some period like cramps for 2 hours but then it stopped. On cd 25 I had heartburn nausea fatigue and minor cramps...NO BLEEDING at all its now 9days. After plan b and I'm due for my period as early as Apr. 2-6. So if I did ovulate would I be feeling preg symptoms so early in my lp? Is there a chance of pregnancy?