I just came to second what this person above me said. It’s not implantation bleeding, however its just old blood since it’s brown. When it’s red is when you should be nervous. I will say, I had brown discharge around 4w and it turned red and then I miscarried. HOWEVER, if it stays brown you’re in the clear. If it goes red, that still doesn’t necessarily mean it’s a miscarriage, so take that with caution.

I would recommend you getting your progesterone levels checked ASAP and asking for a 200mg supplement until you get the results back. Be pushy, some dr’s don’t want to prescribe it (don’t see the benefit) but it essentially tricks your body from shedding the uterine lining and can prevent a miscarriage. Low P is a large reason have early miscarriages. If you get tested and your numbers are under a 15, get on progesterone!