Been having symptoms that seem to be pregnancy symptoms. But I have also heard that some of these could be caffeine related. I only drink one small mug of coffee a day. I have nausea and loss of appetite due to nausea. Sore tender breasts, mild lower belly cramping and lower back pain tiredness, moody the past few days, sudden urge to pee. My period is due in a week. Not sure if I could be pregnant or a caffeine issue. I have been pregnant before.