opk still no peak

Hanna • I`m 23 and married to my best friend. Triplets due October 2017💙❤💙
I took 50mg of clomid cycle days 5-9 and have been getting high fertility readings on my opk everyday since last Thursday. I am now CD 16 and still no peak 😞 does this happen to anyone else? This is my first month taking clomid.