Forgetfulness is a common concern when the brain starts multitasking. It can be a cause of concern only when forgetting is happening over a longer duration and you are unable to recollect, or if you start forgetting your own name, address etc.
Next Steps
Try to relax your mind by reducing information load. Yoga, meditation and pranayam are good ways to calm the mind and body.
Health Tips
If the problem continues, please see a counselling psychologist for an evaluation and further course of action.