I am going crazy with this birth control pill ladies! I started ...

I am going crazy with this birth control pill ladies! I started last month after my period and my last pill was this monday and I have been experiencing ALL of the PMS symptoms each day and it's getting worse but i haven't gotten my period! I'm supposed to start my pills again on Monday but what if I don't get a period? Is this abnormal? I'm 41 yrs old and PMS and abnormal cramping is the reason I am on Yasmin. I am feeling wigged out, tired, and can't sleep through the night. Can anybody help with some advice?