You could also talk to you doctor about switching to Yaz.. When I took Yaz I never had a period.. my doctor said this was fine.. that in ppl yaz will either shorten your period to a day/two.. or take it away completely. .. .. your doctor would know best!
Your not really suppose to skip your period that long on Yasmin. If you wanted to have your period less times a year, then I would suggest seeing your doctor about switching your pill then. There are pills out there that will limit your period to 4 times a year. I think Seasonel and Sesanique (sp?) are the two kinds. It IS OK to skip your period sometimes while on the pill, like if your planning a vacation and your period falls on that week then its ok, but I really wouldn't suggest skipping it for 4 months in a row on Yasmin. Your bleeding now because your body is backed up, and when you skip your period (for that long) you increase your chances of having breakthrough bleeding and spotting. Why were you skipping your period? Is it that bad you can't deal with it for a few days out of the month? Possibly I would suggest to stop taking your pills for a month or two, to let your body have a period, and then start your pills again either on the sunday start or during your period.
Good Luck