I am 4 days late with no sign of AF so I have took a couple tests and all negative but one looked like it had a vvvfl but not sure. I'm always on time. 18 DPO now & my boobs are soooooooo sore! Maybe its too soon to show up?? The tests I took were the cheap 88 cent ones from Walmart but had a Dr. appointment yesterday for just a check up & told her I was late so she did a test also but was urine test... Do they use the same tests? I have a FRER digital & then pink dye test but they are expensive should I wait a few more days before using them?