the ring - a week early

Hey guys, I accidentally switched in my ring a week early. The ring is to be in four weeks, that’s if a period is not desired. M y previous ring was in for 3 weeks (since nov. 30) and I just changed it yesterday (dec. 20). 
Is this problematic? Will I be protected from 1. Pregnancies 2. I’m positive I will not receive my period 3. Will this throw off my body?
Thank you. It sounds so odd but under stress and poor management I hope this doesn’t throw off my body 

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