Lawpei,
Signs to watch out for: Is Trisha ok? Does she seem woozy woozy, not reacting, eyes blurblur?? If she's quiet or keep crying, is it due to shock or you think it's because something is not right? And got fever/vomitting? (if got vomitting, go hospital immediately)
If you are worried, bring down to PD or a GP you trust, or go hospital. Some GPs will just refer you to hospital and even want to charge you for referral letter (siao right?)