So confused: 2 readers, Different Results

So this is my first time posting. We are on Month 4 of TTC. My cycles are anywhere between 27-31 days long. I’ve been using ClearBlue Advanced Digital to test for ovulation and normally get my peak result, solid smiley, around CD 13-15. This month I got a negative on CD 8 and 9. Then this morning it showed my peak at CD 10 and skipped any high fertility days. I’ve never peaked this early. I went out and bought a first response test and just tested at 11:00 AM after holding my pee for over 4 hours. The first response ovulation test barely shows a line and is negative. I’m so confused and don’t know which test to follow. Has this ever happened to anyone else?