Pregnancy Test Timing & Early Symptoms: What You Need to Know

Question
How soon after un-protected sex can you tell if you are pregnant?  

Answer
You do not make it clear what you are wondering.  Do you want to know how soon you can test?  Up to five days before your expected period with some test.
Do you want to know how soon you will have symptoms?  Some women don't have any other than the missed periods.  Others feel not quite right only days after.
Hope that helped.  Good luck!