Sayang, chest pain or sharp sensations during pregnancy boleh jadi banyak sebab, nak expand ribcage, ligament stretching, atau digestive issues, tapi kena check dengan doctor sebab kau first time pregnant dan want to be sure, ok? Jangan take chances, terutamanya if it's sharp like electrical shock. Book an appointment dengan OB-GYN or go to klinik nearest; they can assess properly and give you peace of mind. A few of my mum friends also experienced similar things early pregnancy tapi semua turned out fine after check, yang important is confirm with your doctor, especially at 5 weeks when everything is delicate. Take care!