My dead dad called me

I had wrist surgery last Thursday and have been so anxious leading up to it for about a week. Last Tuesday, I went to internship to go through my day like normal, knowing I was more on edge than normal so it would be best to sit in a room and work by myself, so I did. At around 10:30 AM, I received a call from an unknown number, and declined. I googled the number, and it was the hospital where he died, specifically the rehabilitation center for things such as wrists post-op. I checked it up to something weird and called my mom, when another call came through. I picked it up this time, and heard a heart beep monitor. I ended the call and called back, and got a call busy line. I eventually called their other number, who informed me that it was their fax number, and no one was trying to fax me anything, as they didn’t even have my number in a file. I received five calls over thirty minutes from this number. It was so weird, and I know it was my dad telling me that I would be okay, and my surgery would go well.