We have been TTC this month and my period would theoretically be due later this week (I have not been charting so I don't know exactly when I ovulated, and I am recently off the pill so I don't know exactly how many days my cycle will be). I took a pregnancy test today and it was negative, but based on timing it could just be too early. For the past 5 days I have been completely exhausted (falling asleep really early, sleeping 12 hours and still being tired later that day) and my nipples have been sore for the past few days. Not my breasts, just the nipples themselves. They have also been erect pretty much 24/7. I have never experienced this before. Could this be a pregnancy symptom? Is this normal? They are not darkening or anything, just sore.