Ahhh sayang, being overdue is so stressful, I remember that anxious feeling! Tapi since you're already past 40 weeks and due to go in on the 5th, please don't wait and go to your hospital or clinic TODAY or call them now to check on baby and yourself, okay? The tightening (ngeras) and back pain might be something they need to see right away. Once you're checked and everything's confirmed okay, lepak je and try to rest, a few of us went through the waiting game and honestly the anxiety is the worst part! Let me know how you go, thinking of you!