I recently bought a set of 100 cheap pregnancy tests online.I have used them from my previous cycle.This month I started testing and today, (10 dpo..I know its early..but I just can't wait.I am going crazy)I am getting faint lines after exactly 15 mins.I took 4 tests from morning and all 4 turned positive after 15 mins.I tested with clear water sample to check the quality of the test and there was no second line or evap.Can someone please give in your suggestions.I am getting a branded test tomorrow.

UPDATE!!!! I TOOK A BRANDED TEST TODAY AND IT TURNED POSITIVE IMMEDIATELY!