birth control question.

Sydney • Modern Hippie. Yoga Enthusiast. Vagabond by nature.
Looking for advice here. 
Yesterday I should have started my new pack of BC but the pharmacy told me I had no refills so I would have to get it Monday when my doctor could be contacted. Today they gave me the same story; which means I have missed two of my first pills. 
Not really worried about the pregnancy issue because I often use condoms in addition to my BC. However, I am having HORRIBLE cramps, am highly emotional and so sleepy. 
Is this from the lack or hormones?
How should I go about starting my pills once I get my hands on them?