So, you feel you could have anxiety and have memory issues.
We cant diagnose but I'd firstly utilise your mobile phone, use the notes section to list your tasks, things to purchase etc.
Acknowledge that stress can cause a heighten level of anxiety.
Chat with your GP.
Being with someone produces a distraction which adds comfort. When alone at shopping centres try sitting at a cafe and listen to sounds and relax.
Beyondblue topic anxiety, how I eliminated it.