When will my miscarriage actually start? I'm so confused..

I was 5 weeks pregnant and got told I was miscarrying yesterday because my levels dropped from two days ago down to 416. Wednesday morning i had one cramp that lasted a few second and then I had brown spotting only when wiping then by Yesterday morning it turned to dark red with some little stringy pieces of brown in it but only when wiping all day long And today Its dark brown and only when wiping. When will I actually start to bleed? I haven't even had any cramps