Hope all is well. Do not stress yourself which I know is easier said than done. Brown is better than red and spotting only at 5 weeks is normal. Any concern then phone the docs - its what they're there for. Good luck x
I had that from weeks 5-7 if I remember correctly. And I was told everything was okay and it was.
But I would get checked to confirm. It could be implantation bleeding.
I would get checked out, regardless of whether blood is brown or red. I've had a miscarriage before with light spotting and no cramping.
It could be multiple things. If you bleed with the cramping, that is your sign that there is a possible issue. When in doubt, call your doctors office. They are usually pretty good about telling you if they are concerned or not.
From what I've read no. As long as the cramping isn't severe and you are spotting brown you are ok. If it gets worse then go to the ER.