Hai hun, first trimester memang sering terasa macam-macam sensasi yang confusing kan, especially kalau second pregnancy! Kebanyakan dari kami yang dah experience rasa palpitations or fluttering kat early trimester, tu normal sebab hormones and blood volume changes, tapi since ni first time you felt it, best you mention to your doctor just to check everything's okay lah. The frequent peeing part is 100% normal dah (progesterone lagi), a few of my mum friends had the same concern, and they were all reassured by their gynae. Jangan worry sangat, tapi definitely inform your doctor so you can put your mind at ease!