Every pregnancy symtom BFN??

Krista
Ok so I'm like 99% sure I'm pregnant, I've been having morning sickness, sore breasts, been moody, I use to drink every night but all the sudden got turned off by alcohol, sensitive to smells (I can't even wear my own perfume) I've been having crazy vivid dreams, been constipated and burping a lot and all of this is unusual for me. I ovulated on the 3rd and had mild cramping on one side since then. I'm 10dpo and my period is in 2days. Why am I still getting a BFN when I test??