Irregular bleeding? HELP!

Ashton • wife | musician | creator
Alright, folks. I need some help. I've always been really anti-hormone pills, but a couple months ago, I was left with them as a last resort. I started taking them and immediately had problems. Every day at 1pm, like clockwork, I would puke. I then felt nauseous for the rest of the day. I had my first period like normal and then things started running more smoothly. 
I ended my period a week ago. Yesterday, I forgot to take my pill for the first time. This morning, I woke up with horrible cramps and what looks like blood clots all over my pyjamas. I've now got dark, thick "old looking" blood coming out. I've got the cramps to match.  
Does this sound like it's due to the oral contraceptive? Any other theories?
UPDATE: I have begun a full blown period. 

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