My first day of last menstrual cycle was 6/24, I was supposed to ovulate on 7/11 and start AF on 7/25 but AF has not arrived. I feel super nauseous, boobs feel heavy but not sore like they do with periods and I have been crampy on and off but feels different than normal cramps. I think I'm pregnant but took a test on 7/26 and on 7/30 . They were both clearblue digital and said "not pregnant". I'm getting anxious, should I stop drinking, should I just relax and wait and see. Should I get a blood test, pick a different brand of hpt? I've never been this late nor felt so sure...help!