I'm currently 10dpo, AF isn't due until Fri/Sat. Since ovulation i have had lower back ache, sore bb's, nauseous. The last 2 days I have had quite alot of cm, and currently have back lower back ache, similar to when AF is due. I have just bought a twin pack of clear blue, it says that it can detect early pregnancy 4 days before period is due. Am I too early to test?