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You can only look back now and see how different it felt, as at the time you just want to give birth the " real way"!
Did your carers talk to you about your higher pain levels? I only know a few VBACers in real life but their care providers constantly asked them questions like "where is the pain?", "is the pain continuous or only with the contractions?", "describe the pain, is it burning or sharp?", "does the pain make you feel nauseus" etc. etc. I guess sometimes there isn't a way to know what is going on, as labours can feel different even within normal situations. Even in my (non VBAC, home) birth the MW asked me pain questions to ascertain how deep into labour i was and that i wasn't having an abruption. I hope you don't mind answering all these questions!