Hi,I am 3 1/2 weeks late. My cycle is usually 31 days. I had a HCG test done over a week ago at the doctor office because they said I had some of the symptoms of someone who was pregnant but it was Negative. I have had some very light brown spotting off and on since last week. I'm moody, extremely tired, I've lost my appetite, my jeans don't fit (one day they did the next they didn't, seriously) and I'm going to the lady's room like crazy to empty my bladder. I have abdominal pressure and lower back pain that have just come on in the last two days. Last week I started waking up in the middle of the night sick as I dont' know what. I am just worried because I am so late, my periods have been like clock work for almost a year now. I'm under no stress, I haven't changed anything. If someone could tell me what they think I would appreciate it. Has anyone ever been like this and not been pregnant?