When to test?

Kellie

I am 9 DPO and have sore breasts- I didn't have that with DS or the two miscarriages after him. So, I'm wondering when to start testing?! I want to RIGHT NOW! I have 5-7 days until I start my period. My cycle length is usually 28-30 days, occasionally a little longer. What do y'all think? Can I try and start testing or will I just be wasting tests?