Y u scared me, grammar?!

I have a scared-of-speak-and-write-english, why it's too hard to write or speak something in english, i always worried about my grammar, maybe that's the reason why i'm too scared of speak/write in english language. And, long time ago, my friend who-good-at-speak-english was post a tweet, she said "woi grammarnya!" and since that time i always not confidence when i want post a tweet in english on twitter, aaaaaaa i should more confidence and learn much abt english grammar, yeah! :D