This is driving me nuts, Where's my BFP?!?

I had symptoms before I missed my period with my second pregnancy much like yours: nausea, heartburn, heightened sense of smell, I also had dizziness and frequent urination. I was a slave to my HPTs, I took one like 3 times a day starting at about 12 DPO, yet I didn't get a BFP until I was nearly 2 weeks late for my period! And even then it was faint. It was literally driving me crazy as I KNEW I was pregnant yet I had nothing to prove it! Trust your instinct and keep testing, you will get that BFP! Good luck!