I've taken four pregnancy test and they are all negative. I have irregular periods so I can't go by that. My nipples were really sensitive and started turning brown and hurting starting about a week ago and I've been really sleepy and hungry and my stomach is super bloated.. All like my last pregnancy.. But the test are negative?!! I had unprotected sex three weeks ago and in my last pregnancy I had a positive test right before three weeks after I got pregnant.. Or when the doctors told me my due date and how far along I was I counted back and the day it started on was 17 days after it when I had a positive. So why would my nipples be turning brown other than pregnancy? Because I've had not one but FOUR negatives... It all just doesn't make sense to me. And also I can't go to the doctor right now because I won't get my insurance back until next month..