Coping with Unwanted Desires and Dreams

Assalamu alaikum, I've been struggling with intrusive thoughts and vivid dreams of a sexual nature for a while now. At first, I brushed it off as just natural urges, but soon I found it hard to resist the pull toward inappropriate content. Even when I manage to distract myself, I end up having dreams that feel extra long and stay in my memory way too clearly. I’ve tried making dua and praying before sleep, but it only helps about half the time. I’m starting to wonder if there’s something more to this. Any advice on how to overcome this would be really appreciated.