A week late

So I'm a week late. I've never missed my period ever. I'm not on bc or anything. I did have unprotected sex a couple times but my so pulled out. I took a test at 3 days late and at 5 days late, both came out negative. I do have some symptoms. I keep getting really bad hot flashes, my tummy always feels nauseous at night and during the day it feels gassy. I keep having diarrhea(tmi). I'm constantly hungry, and my breasts keep getting larger. Should I take another test or go see my doctor?