All highs, no peak

Katie

This is my second month using Clear Blue Digital Advanced and I have never gotten a peak. First month a had 8-9 days of high fertility; however, I did end up getting pregnant and having a miscarriage that month. I’ve started again, and same thing, 7 days of high now and no leaks. Is it possible that is just doesnt pick up my surge? Has anyone else had this happen?