7dpo and symptoms!

I'm 7-8dpo today (I think) and since Saturday morning I get up have my coffee so on and then feel a bit off/sick so I eat and slowly over the day it goes away.. Don't normally get this other then that no other symptoms really apart from breaking out in pimples. 
When should I test? 
Af due the 4-5th oct. 
thanks :) baby dust 🙌🏻👪✨🍼