First of all I have no idea how to warm up because somehow it feels pointless. second is that one day I would sing high and a few days or a week later it would seem like my voice is struggling to reach the same height.
I've been feeling this way for years. I've been singing since I was 4 years old but I was ignorant of what it means to be a singer. As a matter of fact I had no idea about the world, that singing can be a profession and that you need proper technique.
Back then I was very shy to the point of feeling like I couldn't breathe. In my spare time when I was alone I would sing at my highest and I would sound a little feminine, but now I don't really know where is my highest.
I often characterize my voice as a road, at the ending of that road is not a barricade it's a collapsed bridge. Sorry for all the intro but my question is, how do I get to the other side of that bridge or how do I release my voice to go higher and extend my vocal range?