is it too late to start progesterone?

Danielle
I'm 4 weeks 4 days pregnant today. I saw the Dr today and took an hcg and progesterone test. Getting the results tomorrow. I miscarried in Dec 2015 and I'm so nervous it will happen again. I have had brown spotting for 4 days, cramps everyday, nausea and tender breasts. I read those were normal symptoms in early pregnancy but after reading about symptoms of low progesterone, I'm scared that my symptoms might be caused by that.   If I do need progesterone, I hope I start it in time. Is spotting for 4 days normal? I know it's silly but I have a fear of going to the bathroom now because i don't want to end up seeing blood from a miscarriage. How far along were you when you started progesterone?