I am not sure if i am outing this in the right place.......

I might be pregnant

I stared my period on sunday and I finished last wednesday, I always last for three days
So I am guess that i am on the 22 days cycle. I am not sure

I had unprotected sex on thursday and again on friday, both times he ejaculated and having these early symptoms.

Tiredness
Cramping
also of discharge

Do I have to wait till the two week or three weeks wait is over before i take a test?

Please help.