Early ovulation question. Please help!

Renee
Ok so fertile week is predicted to be dec 7-12. From what I've read its most common that your highest fertile day is the second to last day of fertile week. However, all day Monday the 7th I had ovulation pain on the left side accompanied by ewcm that started Monday evening. The pains continued into Tuesday. Ewcm has gone away, 
Question is, is it possible I just ovulated early this cycle?