5/6 week cramping

Cheryl
I'm about 5 weeks and 4 days pregnant. First pregnancy. Meet with my doctor next Thursday. For the past week I have experienced cramping off and on for most of the day. It feels like period cramps but can be a little painful at times. I have not had any bleeding but this morning when I wiped it was a just a little brown. 
I also have very swollen sensitive breasts. And that's the extent of my symptoms. 
Is the cramping normal? 
Is anyone else experiencing the cramping?