My son in 21 and has a form of autism. To be brutally honest if it weren't for him I doubt I'd still be here, so I understand where you're coming from.

FWIW I had ECT three years ago. There was some short-term memory loss but it has lessened in severity over time. Long term memory was unaffected, as was overall ability to process stuff - general intelligence or whatever you call it. If you reach the point that it's clear it isn't helping, pull the plug, but if you do notice improvements I'd say not to worry overmuch about scatterbrained-ness as it's likely temporary. Go with what's working. Listen to the doc. Get a second opinion if necessary.