Brownish pinkish discharge

Laurana

So today I wore tightish pants all day. I have been cramping since day one of pregnancy (thats normal for me). When I sat down once i had this strange pain like in the pit of my abdomen. When I went to the bathroom and wipe there was some pinkish discharge (it was thick in consistency). The next time I went to the bathroom I wiped and there was brown discharge. I am thinking it came from irritation of wearing tight pants but can't help worrying. I am 7 weeks today... Should I worry? Anyone else have this?