Sometimes when i wake up i can't see?

I allready know that I'm a little bit nearsighted and i hav a mild astigmatism. But, sometimes when I wake up in the wee hours of the morning or at my usual wake up time i can't see. I'll try and look at the clock that is only half way across the room, but It's such a blur that i can't even tell it's a clock I'm looking at, even if i like, blink hard and yawn it won't go away.It hasn't always been this way either, it just started in like the last 6 months Is this normal, or does it seem like something serious?