Dreaming of being impure

Salaams mufti I sometimes after Fajr have nightmares that I’m in a state of Janaatbat an i feel so humiliated an filthy like I must cleanse myself quickly and I think it’s because I committed Zina with someone the person I had relations with isn’t my husband and once I dreamed it was my late father I had relations with. In the dreams I thought he was my husband and then realised what a horrible things happened i remember in the dream wanting to wear clothes that must cover me well cos I felt so embarrassed and humiliated.
I wanted to ask ask you what could this dreams mean they always happen after Fajr is it shaytaan playing with my mind or some kind of jinn problem?
Or is it something I’m doing wrong in my life that’s causing this hideous dreams I wish they stop
Plz help me with any advice
Jazakallah