what is the punishment for missing 1 prayer

what should i do if i stayed up until after fajr and when the time came i didn’t make wudu until a hour passed so there was 1 hour left when i made wudu, i was about to pray my mom woke up and i talked to her while i was lying down in my bed so when she went to sleep i’m pretty sure i fell asleep and missed fajr because i can’t remember praying it, what should i do? (my mom doesn’t pray so don’t say why didn’t you pray with her)