Clearblue fertility monitor ?

C
Confused! 
This is our first month using the CB fertility monitor. My cycles are usually 25 days. According to glow my fertile period was June 4th-10th. AF due on the 22nd.
However, the fertility monitor has been low every day so far. (CD 12 today) No highs, no peaks. Now I know people O after CD 12 but I'm nervous because my cycles are shorter. Does anyone know how much time is typically needed for implantation?
​I have put it my information/ovulation tests/bbt and now glow has automatically changed my fertile days to the 8th-14 and AF has been pushed back to the 26th. (This is a much longer cycle than I ever have.) I'm so confused! Any ideas?  :(