Nipple trauma can trigger vasospasm so unfortunately that could be it. Keeping your breasts warm often helps ease the pain - did you try breast warmers last time? The medication also helps lots of mums with vasospasm so if that worked for you last time that's an option for you too.

Has the damage to the nipples healed now? If there is ongoing pain it could also be that attachment isn't quite right. Sometimes things like minor tongue-ties or high palates can go unnoticed but can cause attachment issues. Presumably your LC has checked for all of that but it's worth keeping in mind if things aren't improving.

You are doing such a great job - I really hope it gets easier for you soon