11 dpo soon,

Bethany • 31 years of age, very opinionated but thoughtful
Okay so I've consulted with several other sites to determine next cycle date, everything is saying between the 19 (webmd) and 1 (glow) is this normal? What does people recommend should I wait until the 20th like webmd recommends or should I wait until December 2 when glow recommends. 
Having nausea, heart burn and bloating currently. Earlier I had slight spots.