Uy, ang cerclage is a delicate procedure talaga, kaya please check with your OB agad about that sudden sharp pain, hindi ka dapat mag-assume na normal lang yan, hinahanap lang nila kung ano exactly ang happening sa area na pinutian. 4 days pa lang, so your body is still adjusting, but your doctor needs to know para ma-rule out any concerns, lalo na if it comes and goes like that. A few of my mum friends who had the procedure said they had sensitivity, pero hindi naman sudden sharp pitik, different experiences really, so better safe than sorry talaga. Just message your OB or go in for a check-up, Ma. Take care!