I agree with auroara, I would get an FRER. It will really help you to alleviate the stress, and at this point, you really should know by the results of the FRER... I know it is a lot of money, but with the cheapies, you may be going through this for another 2-3 days at least!
For the cheapies, faint positives are the reported majority all the way up until 15DPO, and even then, faint or very faint positives are still coming up for people almost 50% of the time!!! It isn't until 17-19DPO that the ICs should be good to rely on, according to Countdown To Pregnancy:
Pregnancy Test Results by Brand - Internet: Dip Strips | Countdown to Pregnancy
Your chart still looks good. I'm sorry you're going through testing hell! xo