Tender breasts n nipples, darkening areolas, goose bump looking things on areolas, spotting, increased urination,, fatigue, nausea, more sensitive to smells, bloating, higher body temp, missed period, mood swings, discharge, constipation, cravings/aversions..this came from the what to expect when you're expecting book. It also says symptoms usually occur around 6wks but everyone is different and can experience this sooner or later or not at all.