So on Saturday morning I got the solid smiley which means peak fertility on my clear blue digital advanced ovulation kit, which stayed on the device for 48 hours. Once the smiley was gone yesterday morning I tested again Monday morning/night and got an empty smiley showing low fertility well I tested about 15 minutes ago and got the peak fertility smiley again. Me and my SO dtd all 4 days leading up to the initial solid smiley and dtd on those days as well. Could the solid smiley I seen 15 minutes ago be picking up on early pregnancy levels? Or is this just an invalid test.