I think you've had a misdiagnosis. A TIA means a clot or narrowing resolves itself before any permanent damage occurs. The problems caused will resolve within 24 hours, and if it lasts longer, then it's classed as a stroke. If you still have memory issues, and your last TIA was over 24 hours ago, then it's a stroke you had which does result in permanent damage. I think they need to do a scan to evaluate if there has been any damage and give the appropriate medication and support.
