Bleeding after miscarriage?

Crystal • Pregnant with Rainbow baby
So I went to the er Fri and left with the diagnosis of threatened abortion. Yesterday morning I passed what I believe was the sac and baby. Last night my bleeding was almost at a stop. Was on there when I wiped. This is I woke up to soaked panties and now I feel like I'm having a horrible period. I changed my tampon 20 minutes after putting one in because I bled threw it. Is this normal? How long will it last? This was my first mc. Any advice would be great. Thanks ladies!