6 weeks and having diarrhea. Is this normal?

FionaC5

I am 6 weeks along and started having diarrhea yesterday morning. I had it all day, through the night and still having it this morning. Is this normal in your first trimester? I've read so many things that say women will get constipated during pregnancy but haven't read anything about diarrhea. Also is there anything I can take to ease the diarrhea? As the day progressed, my cramping started to get worse. Not constant cramping but sudden really painful cramping...then it subsides and I feel fine. Also a bit of brown discharge started. Still nothing to worry about?