Sayang, chest tightness and difficulty breathing is something you really need to get checked out by a doctor or go to the hospital straightaway, jangan tunda, okay? This is not something to wait for. Numbness in your limbs plus breathing issues together needs proper medical attention urgently. A few of us mums have been through pregnancy scares like this, and honestly the doctors need to rule things out properly to make sure you're safe. Please go now or call for help if you're feeling worse. Take care of yourself!