Perhaps you developed some repetitive behaviors as anxious responses in adulthood.
On a show about OCD, some of the OCD people were stimming like mad.
If someone has repetitive behaviors in childhood, the most likely scenario is that parent would remember, because repetitive behaviors are so repetitive that parent would notice and wonder why you were doing something so much, and even more so if it was a weird stim, and they may have tried and failed to get rid of it.
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Drain and plane and grain and blain your brain, and then again,
Propane and butane out of the gas main, your blain shall sustain!