Dear Welcome to HCM We understand your concerns. I went through your details.I suggest you not to worry much. The symptom you are mentioning does not point to short term memory loss. It could just be selective forgeting. Your brain hs the capacity to forget something which you do not want to remember. The same thing happens in the case of undue anxiety and restlessness. The case of forgetting keys is one example and the other one what you are experiencing now. Therefore, unnecessary worries may trigger selective forgetting. You can post a direct query to me in case you further need my services in this case. Hope this answers your query. Available for further clarifications. Good luck.