I've a rule in my life when not motivated put aside things you are trying to do, don't force yourself, go out watch the sea, think about how things came to zero motivation, what is wrong or just have fun to forget. Demotivation and Motivation end up to be what makes you live every day if you think about that, Demotivation makes you find new things to motivate yourself, things that can open to you new paths, good things, motivation makes you create beautiful things and as everything, They are both things that happen no matter what you do to your life. So don't worry if you are demotivated, strength will come.