Blocked

My sleep deprived self and I are listening to music and attempting to draw. I say attempting because for some reason lately I’ve been completely unable to do so properly. It’s a problem I’ve never experienced before when it comes to drawing, it seems to stem from an inability to properly process dimensions of drawing that help me make the faces proportionate. No matter how many times I measure and re-measure and how certain I am that everything is in it’s proper place, the next time I look at what I’m doing and measure – yet again – something is always way off. And this is with taking measurements, I can usually just do it by sight. It’s really frustrating! I’m not really sure what’s up.