Early negatives

Shannon
Hi everyone !
So, I have been doing something very silly... I am 8dpo and have a ton of symptom that are getting progressively worse! Currently sat on a bus having a hot flush , with heartburn and nausea! 
Because of this I am obviously impatient and have done a test. Negative. I know this may be due to it being too early but I can't help but get upset as I think maybe I am imagining it? 
I know this isn't really the case as even my SO is convinced I am! Normally when I think I am I don't really have signs he he knows I'm not.
Just wondering , anyone else had early symptoms, tested too early , got a negative/s , got disappointed and then got a BFP