Bleeding on progesterone

Joy
Hi! So I have been on 400mg of progesterone for a week. I am 6weeks 5days. I have been bleeding all week? It's not clumpy though like a miscarriage would be. But I have been cramping a little. 
My question is: is this normal with progesterone suppositories? Everything I read says that brown spotting is normal. I hear nothing of red spotting.