Astigmatism

When I look at an object, and move my head to look at it through different angles, I realize that I have blur in many directions and clear in others, when I move my head left to right, it blurs at one angle, clears at the next, then blurs at the next then next angle then clear again?
Is this normal astigmatism or something alarming?
Most of these problems usually happen in the top area of my visual field, I also see double vision, ghosted images, and sometimes round lights look round in all sides, but the top of the round object will look bit longer, basically it gets distorted at the top?
So are these normal for astigmatism, or something more serious, and do a vision training app like I found someone suggesting it on endmyopia forum, do they work for correcting astigmatism?