Brown spotting is completely normal. I went through it at 6 weeks and 9 weeks. It it starts to come out red, dark red accompanied by pain then I'd contact your Ob provider or go to the er. Brown and pink spotting is commonly due to the placenta attaching onto the lining of your uterus which is known for implantation bleeding. Is 100% normal hunny! Don't stress to much about it!
Brown is fine it's old blood being cleaned out its normal in the first trimester. as long as it's not accompanied by pain and doesn't become red then you're okay