How long do you wait to test after implantation? I'm not supposed to start to 5/7 but I started a light bleeding today and idk if it's my period or implantation. I tested this morning and it was a BFN. I don't wanna lose hope but I feel like it's all gone down the drain :(. I took clomid last month and been ttc but I don't know If it worked or how to tell the difference between period and implantation. Please help...