Did you use the same kind of test? I definitely see the lines!! Maybe your urine was more diluted? Chemical wouldn't make the hormone disappear straight away (I think). I also had a chemical in July, am 11-12DPO today, after seeing some lines on different tests a couple of days ago I bought FRER and got a BFN... But I still feel pregnant, hot flushes, wet feeling, soft and high CP, let's hope we will test in a few days time and get our BFPs!!!!