My last period was Jan 17, 16. My period was suppose to start feb 14, 16. I haven't seen it but I've been having cramps and back pains. I feel tingling in my boos, but I've taken three test on didn read and the other two said negative. What am I doing wrong?. Is it to early to ready or am I'm not pregnant and I also tried the bleach test which showed positive. But that was just for fun. Help