HELP!!! So confused! Two ovulations in one cycle?

I took Clomid last month and ovulated CD19. I took it again this month and got a positive opk CD14 and bbt spike from CD13-17. Then my bbt dropped significantly for a few days and I was so upset. I've been taking OPKs everyday just in case but all negative. TODAY I am CD21 and noticed a dull pain in my lower right abdomen/ovary when I woke up, and bbt rose a little. I took an opk to check and it was positive! What's going on?!!