Last Time That I Woke Up In The Morning With

Last time that I woke up in the morning with a migraine I started throwing up which always happens with my migraines. However this time I did not vomit my dinner from the night before but instead threw up clear liquid with some pale yellow or very light tan and a bit of pale pink stuff In it with a bit of little bubbles. Over the next six hours this happened several times wrenching my stomach muscles but the total of it all was probably a bit more than 1/2 cup. On previous other occasions of vomiting with migraine that I wake up with I throw up lots and lots of liguid with food in it and then when that's gone I throw up bright yellow bile that has a nasty sour taste. Why was it so different this time and does it have anything to do with the bleeding ulcer I had 2 months ago?