I've been missing fajr for two weeks straight

Salam everyone. For 14 days now, I keep sleeping through fajr and I don't know why. I've tried so many things – I go to bed right after fajr, I recite Surah Mulk, Ayat al-Kursi, the last two verses of Al-Baqarah, and the three Quls before sleeping. I do dhikr and make dua asking Allah to wake me up, but I still end up oversleeping by two hours. What am I doing wrong? Isha is around 11:30 pm, I'm in bed by midnight or a bit after, and fajr comes in at 3 am. The only thing I can think of is building some crazy alarm that sprays water on me. I'm also the one who calls the adhan for my family, and I'm scared I'll be held accountable for every fajr I miss, including my family's prayers.