I was on Yaz for about 5 months...first 4 months seemed great...In fact I didn't have a period at all and my acne disappeared! But, I was feeling fancy...irrabtible..but, didn't think too much about it until the 5th month on the pill..all of a sudden I had extreme panic attacks, went to the ER and everything...and my blood pressure was very high. I felt so crazy and scared like there was something really wrong with me..I thought i was going crazy! i have been off of the Yaz (stopped in the middle of the pack) for 3 days now and feel so much better...it was very scary.