6 weeks 3 days help!!!

Reagan

So up until now everything has been fine.

But last night when I went to the bathroom for the 100th time to pee. I wiped and I had a pinkish discharge. Today it has been brown discharge. But the last week every time I stand up or move the wrong way it’s like I’m cramping. This is my 2nd pregnancy. I lost the first one at 10w5d in late February.

Should I be worried?!? I have my first u/s on Wednesday at 6w6d