Brown spotting and slight cramping.

I've had several miscarriages. I am 5 weeks and 4 days. I am wearing a panty liner and there's barely much there, but I worry a lot about losing again. I am supposed to be on my period now. Is this normal? I see my doctor on wed. Never had the light brown spotting before. When I miscarry it usually is bright red. Any words of comfort and wisdom would be great.