Bbt chart

I am having some confusion. I had a hsg test this month. I was all clear inside but I did have cervical stenosis so they dilated my cervix. Now, this in only my second month check my bbt, but, I had a positive opk and was sure to do it as much as possible for the 4 days that it was showing a surge then a peak. Now...my temps have not gone high at all like last month and then this am I had a drop. I am really confused. And today I also woke up with an ache in the back of my right thigh by my crotch. Almost like a bruise or pressure (hard to describe) any thoughts??