Birth control-missed period

I started taking the birth control Lo Loestrin Fe on November 12th. I hated it. I had a period for nearly two weeks and bled heavily (lots of lining of huge period clots). I informed my doctor, so he switched me to TriLinyah about three weeks ago. I'm on my fourth week or period week. I have yet to start. The sugar pills started Saturday and it's Monday. Is it normal to miss a period when first starting birth control? I'm having PMS symptoms/side effects but have yet to bleed.  I'm a virgin so I'm not pregnant. 

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