Ovulation question. Please help!!!

I have recently miscarried (about 2 and a half weeks ago) my Dr already said its okay to start trying again. So Friday I used an opk and it was positive. My and my fiancé bd'd. Later that day my surge had passed. I tested again and the lines were no where near matching now. So next day (Saturday) I tested on another opk just for the hell of it and had another positive. This surge lasted all Saturday and all of Sunday. Does this mean I ovulated 2 times? Never had this happen. Before my mc when I ovulated the surge didn't even last a full 12 hours. What do you think??