Confused !!

Taija.
So since 4dpo I have had 
​- sore bbs
​- heartburn
​- cramps 
​- nausea 
​- sore throat
​- cough
I can't work out whether there symptoms or im coming down with something as I feel like I need a day in bed!!! 
​Seems ridiculous to only be 8dpo and feel like this? 
​Anyone experienced anything like this? X