It appears that a false peak has been charted. This is due either to an error in charting daily symptoms, or wide hormonal fluctuations in your body. You are in the fertile phase until a clear pattern of infertility develops.
During the fertile phase, avoid sexual relations once there is a change from dryness to wetness, either mucus is seen or a slippery wet sensation is felt. Pregnancy may result from sexual relations or even genital contact any day before the peak and the 3 full days which follow it.