Aww sayang, heart palpitations dengan keletihan tu memang common dalam early pregnancy, especially first time mummies sebab hormon berubah banyak sangat, tapi better check with your doctor ASAP to rule out anything else like anemia or thyroid issues, a few of us experienced this and doc just did simple blood tests je. Make sure you're eating enough, staying hydrated, and resting sebab your body tu kerja overtime supporting baby! Try not to worry too much (easier said than done kan) but do get it checked out so your mind senang.