Am I going crazy? I've been taking yasmin for only three weeks, i...

Am I going crazy? I've been taking yasmin for only three weeks, i started having horrible back pain a few days ago that wont go away, and for the past three days i've litterally crying non stop and i dont know why which makes me cry more and have been very short tempered with my boyfriend over stupid things that dont matter at all. bless his heart because he probably thinks i'm crazy...I'm really considering stopping it because the only reason i was put on it was because i had a cyst on my ovary and its gone now so i figure from what everyone else is saying the sooner you quit taking it the better. someone please tell me i'm not going crazy thanks, steph