Help! Can you tell how many dpo I am?

Hi! I got a BFP yday on First Response Early Test with SMU. I then got a BFP on a CVS brand digital test midday today with super diluted urine. 
Can you tell how many DPO I am from the results on my first response test? Also, what's the minimum DPO I could be if my HCG is high enough to register on the digital test with diluted urine?