Ayyy jangan risau dulu tapi please go see your doctor as soon as possible okay, cramping boleh normal, tapi sakit pinggang dengan aktiviti kena check sebab kita tak boleh tau sendiri. Better safe than sorry lah, especially at 5 weeks! Go to your nearest clinic or klinik kesihatan, jangan tunggu lagi. Apa yang ada di hati, bagitahu doctor terus-terus so they can advise properly. Hugs!