Brown Spotting starting at 5 weeks

I started spotting at 5 weeks and it has now lasted for 4 days. It is light and only need a pantyliner. I have had mild-no cramps (think I’m more paranoid) and my OB advised me to go to the ER. They said it was still early to tell if things were normal or an early sign of a miscarriage. I go tomorrow for related blood work to check my HCG levels. Anyone else experienced this and had a positive outcome?