The reason your temps seem as if they are "low" is actually because your Pre-Ov temps this cycle were higher than last cycle, which made your CL higher than last time too.
I will agree, that your thermal shift isn't quite as big as it was last cycle... I've had months like that... perfectly normal.
I certainly wouldn't worry too much right now... you're only in the first part of the TWW. Your temps might surprise you in the second week!!!
Best of Luck & Baby