breastfeeding & pregnancy ???

Hi all!

So I gave birth to via csection to my son 11 months ago, and have been breastfeeding him since he was born. I haven’t gotten my period yet at all, but I was wondering if it’s possible to get pregnant even though I haven’t gotten my period?

Last week I was breaking out and cramping which I figured were just signs that my period would be coming. This week I was still cramping and i’ve been feeling nauseous as well. My boyfriend thinks i’m pregnant (we had unprotected sex almost a month ago). I’m going to take a pregnancy test next week if I still have these symptoms but I just wanted to know if this has happened to any of you :)