3D memories in a 5D world

Do our forgotten stored memories suddenly be restored? Do we remember all of our current and past lives? The good, bad & the ugly? Do our feelings get affected or do we “see” our memories as if watching a movie? Is that EGO talking?

Is reincarnation in a 3D timeline? For instance, say I have karma leftover from a certain timeline, can I go back to the same time period and relive that life but make different choices? 😊