week late

I'm a week late, I took 3 pregnancy tests and all say negative. What else could it be? I'm 30 and my mom didn't go thru menopause till she was in her late 40's early 50's my mom has hypothyroidism but she developed it in her early 20's. I've been fairly healthy my whole life. Last time I went to the ob was 2 years ago and she said everything was fine. I recently broke up with my bf but it was a month ago. I went thru a slight break down but it didn't last long. Last time I had sex without a condom was 3/28 but he always used the pull out method. 2/25 he said he might not have pulled out in time. Am I barren?