Clearblue opk false positive?

Katy • 2 miscarriages (1 d&c). 2 chemicals. 2 ER. 1 FET❌ (5DAA) 2 FET (AB)✅ EDD: 10/5/21 🌈👶

I took an opk test today. According to the app I shouldn't have a surge til Tuesday. But I got a smiley face this morning. When I took the test out, the line was def lighter than the control. Could it be a false surge?