Lesh, brown spotting is very common in early pregnancy especially you're about 6 weeks along. I had my brown spotting at week 6 too which was why my Ob wanted me to do an early ultrasound. She explained to me that the brown spotting could be implantation bleeding which was not let out until later thus brown and not red. Then, at week 8, I also had very light red spotting because my bub's sac was growing and sat on a small blood vessel (which was why I had to have another scan at week 8). Spotting is not unusal, but I know it could be worrisome. Since this is my first pregnancy, I tend to worry a lot too (it's natural!). As long as you don't have bad cramps and heavy bleeding, or presence of clots.... there's usually no problem to the bub! By the way, good luck with your pregnancy & keep us updated on how you are doing!