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Great you are doing CrossFit and have been using Becoming A Supple Leopard for a few months.
I’d recommend seeing someone.
You’ve taken a crack at and it needs more. Sounds like there could be a couple things going on.
How long ago did it happen?
Your glutes could be protecting something else.
Check out a search on the episodes link and the daily|mwod like to address what you are experiencing upstream.