Help me !?

Malanie
I had a provara induced period and also started on metformin. I have been taking opks. From 6-26 till 7-10 and they have all been negative. I had a surge on the 29th and the 30th. It says my period isn't for another ten days. I haven't had any noticable cervical mucus. Is it possible I ovulated on the 30th? Or did I miss it ? I'm all confused