Temp not spiking?

Why is my temperature not spiking? Could I not be producing enough progesterone? I take my temp everyday same time and its all over the place. I had positive lh surge few days ago and had ovulation cramps the last two days. Last month I spiked and then about 6-7 dpo my temp dropped to about .2 degrees above my coverline. This is my second month coming off bcp.