Weird Noise That I Heard While Sleeping In My Backyard

My name is Sebastian 18 years old, honestly I'm not sure if this is even worthy of publishing here but I just want to know if anyone else have heard what I heard that day. I have a house with a big backyard with some trees and a lot of grass (obviously) I have a lot to worry you know school and what I'm going to do with my future so I'm stressed most of the time and sometimes my head hurts really bad because I think too much sometimes. One day I decided to lay on the grass and just relax a little bit when I did this and stayed there for some time my headache and all my woryness vanished, I felt grateful with nature so since then every single time I feel very stressed I go outside and and just lay on the grass and watch the clouds go by. One day I just felt the necessity to go outside, I did the exact same thing I do all the time (lay on the grass) I stayed there for about half and hour but out of nowhere I started hearing this noise, it sounded like a flute but I'm pretty sure it wasn't. I thought my neighbour was the one making that noise but the wasn't even in the house, I started searching from where it came from because it made me feel so peaceful and relaxed and I didn't wanted it to end but after looking for sometime it just stopped. I couldn't find from where it came from or what was making that noise, but I have never heard anything like it, never! It sounded like it came from everywhere like it was air just everywhere... After that I just went back inside and that was it, I hear the noise a second time but it lasted even shorter. I don't know if this has anything to do with this but sometimes when I concentrate on my hands I can feel like a tension in them or something like that, almost like electricity. I have a cat and I tried moving my had around his hair without touching him with this (energy) concentrated in my hand and I could see his hair moving upwards in the direction of my hand, and my cat hate when I do that hahaha he gets really mad:p

Thanks for reading this far... This is probably not worth reading.