Hi mama! Ito talaga common sa pregnancy, lalo na ngayon pa lang kasi lumalaki na ang baby at shifting ang hormones mo, pero since 3 days na talaga at worried ka, better check with your OB just to be sure na walang iba pang issue, basta peace of mind lang, diba? Stretch, rest, at warm compress helped me a lot rin noon, pero kailangan mo talaga ng go-signal from your doctor na okay lang lahat. Ingat sa'yo!