I had unprotected sex about 15 days ago which was my first time. He didn’t pull out and we didn’t use a condom but the day after I took a plan b pill. But for the past weeks I’ve had really bad cramps. I was suppose to start my period two days after I had sex but I never got it but I figured it was due to the plan b. Then about 8 days ago I bleed but only spotting for one day and it went away. I’ve also have been waking up feeling nauseous in the morning like I need to throw up but by the afternoon I’m fine. Is there anyway I could be pregnant?