Help me over to over come this

This is sounds really stupid now that I’m typing this but I haven’t said this to anyone. Whenever I’m in my house on my own or in bed etc I can’t help but overthink about scary stuff (making up noises or scary faces and sounds) and normally that’s normal but it’s gotten to a point where I’m losing sleep over it and proper panicking. The other night I almost had an anxiety attack and barely slept. This is as of recently (past month) and have no clue what to do