Sayang, chest tightness, shortness of breath, fast heartbeat, and numbness in hands and feet, these are things you really need to check with your doctor or go to the clinic TODAY, okay? Jangan delay. First trimester memang banyak perubahan, but these symptoms together need proper checking to make sure everything is okay with you and baby. Better safe than sorry, especially involving breathing and heart palpitations. One of my mum friends had something similar and turned out she just needed monitoring, tapi kena check. Go see your gynae or midwife ASAP, don't wait until your next scheduled appointment.