Hi, I have taken three pregnancy test . I am kind of hesitant to go out and buy another one as the first two I had was left over from my last scare . I have been through a miscarrige this year in late January, so since then my periods have been irregular. I checked the date on the test and it has not expired. My fiance and I have been having unprotected sex since and each month my cycle has gotten later and later until now there hasn t been one. It is the close to the end of July (the 23rd to be exact) and I haven t seen any bleeding since May 19th. I waited until the first of this month to do the first test but it was negative. Should I test again or go to the doctor? I have a history of skipping the month of May prior to beggining birth control which I used for 2 years before the misscarriage.