my last period was 22nd may, i took 2 HCG home tests and they both showed negative. One when i was 10 days late and the other today which makes me 12 days late. Still no sign of my period... ob/gyn says take 6 contraceptive pills and it should come down... is this safe? do i need to take a blood test just to confirm whether i am or not? the hcg tests i used on my 3 previous pregnancies , 2 viable and 1 miscarriage over a year ago... what do i do?? I am freaking out here>????!!!!