My period was due on the 9th ending on the 15th. Today is the 16th and I haven t had any signs of it coming. My boyfriend and I slept together almost everyday from the 28th through the 5th. I ve had nausea, light cramping, heart burn, the smell of McDonald s made me barf, dizziness all of this for about 2 weeks now. I took 4 pt. Tests on the 10th, 11th and 12th. All negative. Should I go see a doctor for a blood test?