Kaki kembang in first trimester is actually quite normal, sebab hormones dah mula affect fluid retention and circulation, tapi I'd say still worth mentioning to your doctor at that scan nanti, especially if it's sudden or one side je yang swollen, okay? Morning sickness tak severe is totally fine, many of us didn't get the dramatic nausea, so don't worry lah. The backache and breast tenderness you're having sounds like textbook early pregnancy, so all those signs together memang point to pregnancy. Just hang in there till your scan, doctor will confirm everything and give you proper reassurance!