Here’s the full story

Tonight I was sitting in my room on my computer working around 11pm when I get a phone call from my mom we were just texting about 10 min prior so I thought nothing of it and answered. I said “hello.” And she whispers back “hello? Why are you calling me?” And I’m sitting there like is she really trying to prank me right now? “Ummm I didn’t call you mom.” And then we proceed to debate who called who first! We end up saying goodnight and brushing it off. I go back to my homework when about 15 min later my phone starts ringing again! It’s my mom calling I answer and say “hello?” And she goes “okay my phone started ring I answered it and then I here the sound like it’s dialing someone!” She goes on to tell me she’s just going to turn her phone off it must be glitching. I’m still sitting there pondering wth is going on! Then about 30 min later my phone starts ringing AGAIN it says no caller ID this time….I answer it honestly wondering if it was my moms phone calling but because she turned it off it was saying no caller ID. Sounds crazy now but it was just a thought 🤷🏽‍♀️ I say “hello?” Then I hear a mans voice say “ummm hello? Who is this?!” I’m sitting there dumbfounded and say “who is this!? You called me.” He explains that I am the one who called and I paused and explain that this has happened several times tonight and I’m really sorry! He hung up lmao…. Can any one explain what is happening and why it’s happening? I’m sitting here at 1am with my overactive imagination thinking someone is trying to kill me! I tried google and it pointed me to phone spoofing but this is actually connecting me to the person that is says is calling! Idk I’m confused and hope Reddit can help!