Outburst At Work! Hormonal WRECK!

Yesterday this Grinch lady that works with me, the whole 3 yrs she just is evil, she calls ppl names none stop, talks trash about ppl and even our boss. Well another co-worker came to me and told me that she had been looking for her and when school lets out if I see her let her know. SO GOING against my better judgement I saw her and I went into the room she was in and said "Hi just to let you know so and so was looking for you to talk to you" she asked why real mean I just said a few things not to get into it, but let her know why. She then started cursing me cutting me off telling me shut the hell up, SO I stood there for a minute in complete shock. I had no words for her but you know what dont hate me bc I came to tell you someone was looking for you and jump down my throat, she again cursed me, so I just plainly told her you know your nothing but a complete B**ch**** she cased me asking what did you say I said you heard me Y-O-U-R A B-*-*C-H... Which she just ran to the boss she cant stand and got a huge thing started. I was so emotional I was crying shaking and went home, my boss just talked to me easy, but she caused a huge meeting and crap!