Cramping tu normal dalam pregnancy, especially kalau ada scar tissue dari previous czer, tapi yang penting kena pastikan takde bleeding atau cramping yang severe, better to check dengan your OB just to be safe, terutama since you're still in first trimester. Makan kecil-kecil tapi frequent memang helps dengan nausea at cramping (I found eating every 2 hours instead of waiting for hunger helps a lot), so try snacking on biscuits atau fruits rather than waiting until you're starving. A few of my mum friends dengan previous sections juga ada rasa similar aches during pregnancy, so you're not alone, it's the scar tissue pulling, but doc needs to confirm everything's progressing okay.