hello. since sunday night (today is thursday) i have been very sick. i went to the doctors the other day, and when i got home, i vomited bile , and i have done so for the last few hours since midnight. whats odd, my lips seem dark and purple after i vomit. i recently took my tempurature and it has gone down to 101.3 today. i have been taking tylenol the last week, but i stopped last night, and i seem to be a bit better. do you have any idea what caused my lips to go black?