Missed period

Michelle

Missed period I was supposed to get it on the 17th last month I got it on the 11th , and I am technically on a longer cycle so it ranges from 34 to 37 days . I used an opk for the first time this last month and now I am late . I took a pregnancy test on Friday the 14th and on Sunday the 16th but still all negative . Could it have been too early ?