Please please please help.!!

Katie • Katie. College student.
Alright ladies I really need some help. I wanna say I'm pregnant but if I was I would only be 5 weeks and 4 days.!
I keep popping negative on a pregnancy tests. 
I have the nausea, my boobs hurt with or with out a bra on, I have bee really moody here lately and I have been havin a slight headache. 
They last time I was pregnant I didn't test positive until I was 9weeks. When should I test again. I tested 3 days ago and I thought I say a positive but it could have just been me.