Possibly pregnant

Im a week late of starting my period. Ive taken a couple tests and all have come back negative so far. With my last pregnancy, it took nine tests and me being 10 weeks pregnant for a urine test to come up positive. Should i go to the doctor and get a blood test? Ive been feeling nauseaus, cant stop eating, super exhausted, and been craving lots of sugary and salty foods. I dont know what to do. Please help. We started trying to conceive at the beginning of the month as well.