Hai! Okay so usually docs akan insist on checking your scar dulu around 35-36 weeks before they greenlight VBAC, so better to wait for that assessment rather than labour early, a few of my mum friends tried VBAC after emergency section and they all did the scan first la. The good news is your 4-year gap is actually quite decent (not like back-to-back pregnancies), which works in your favour! Tapi honestly the decision really depends on what your O&G finds, condition of the scar, thickness, any weak spots, so prep-wise, just keep yourself healthy now, do your pelvic floor exercises, maybe try antenatal classes that focus on labour positions and breathing. All the best with your referral at 35 weeks!