I'm 17 almost 18 and recently had unprotected, "Pull-out method", sex on July 6th. My period was due sometime last week, (the 15th, 16th, 17thish). It did not come. I have been stressing ever since, checking for my period to start every time I go to the bathroom, thinking about being pregnant and what I would do if I was constantly (obviously I am not ready to be pregnant). I have took three pregnancy tests that all came back negative on the 20th, the 22nd, and the 24th. Yesterday, I broke down and told a trusted family member about my situation and she was very supportive, we went and got another pack of pregnancy tests and I'm going to take another in a week or so if my period does not come. Is it likely that I am pregnant if all three tests came back negative or could it be too soon to tell?