My last af 6/26/2015

Monica
I've always been normal with my cycles so i missed my period and i tested when it would be the 4th week mark and it was negative and i also have no symptoms, my boobs are berly starting to feel a lil sore well just strange and im a lil more hungry, im so scared to test again n be disappointed, has anyone tested at 4 weeks and didnt show up positive