What should I do about my heavy sleep which causes me to miss Fajr prayer and leaves me anxious all day?

Whoever is overcome by sleep until the prayer time has passed is not held accountable if he took measures to wake up, based on the hadith: "The pen has been lifted from three... from the sleeper until he awakens." He must then immediately pray upon waking, as the Prophet, peace and blessings be upon him, said: "Whoever forgets a prayer or sleeps through it, its expiation is to pray it when he remembers it." Among the things that help one wake up for Fajr prayer are: avoiding staying up late, going to bed early, supplicating, striving against oneself, being diligent in the prescribed remembrances, and taking appropriate measures to wake up, such as setting an alarm or asking someone to wake him.