If you dream that you forgot who you are; in other words, you dream you have amnesia, it is a serious theme.
By interpreting this dream of forgetting who you are, it can mean that during your daytime, you’re suffering from one or more of these reasons:
You carry your issues with you when you enter your dreamworld. Your state continues in dreamworld. What can you do to help yourself after this dream? You can try to resolve your problems, one at a time. If you need help. Try asking your friends, relatives or professional Counselors.