Ay alam ko yan, first time mom worries talaga! Yung dissolving stitches usually tumatagal ng 2-3 weeks bago mawala completely, so kung natunaw na siya pero parang may opening pa, normal lang yan, hindi siya babalik as one solid line agad kundi slowly lang gamutin ng katawan mo. A few of us tried asking our OB about this exact thing, and sabi nila okay lang as long as walang signs ng infection like redness, pus, or fever, pero I'd really suggest checking with your doctor just to make sure everything's healing properly dahil kahit dissolving ang stitches, gusto mo i-monitor talaga. Keep it clean and dry, at kung may nabago o mas worse pa siya, don't wait, march to your OB agad, basta peace of mind lang.