Doc explained it takes about 6 to 12 days for implantation, and then the hcg hormone slowly rises. So a home test is reliable only around the time of ur missed period. A blood test can confirm a little earlier, roughly 10 days after.
Dont test the next day yaar, it wont show. Wait till ur period is due or a couple days late, then test with morning urine. Thats when u get a real answer.
I tested like 4 days after and obviously negative, felt silly later. Apparently it needs almost 2 weeks. So patience is the only option, i know its hard.