Panicked

I can't believe I'm blogging at this time. It's not even 6am yet. I just couldn't go back to sleep. Suddenly I can feel this feeling I've never felt before. Suddenly my heart beats very fast, my whole body is shaking and I can almost hear the sound my blood rushing to every part of my body. I feel really scared. Are this feelings indicate good or bad signs. Is this normal for someone who is going to enter a new phase in their life?Again i'm scared. :,(

Astaghfirullah hal'azhim. Hasbunallahu Wani'malwakil