Ovulation tests

My husband & I are trying for our 2nd baby. We used clomid the first time around & got pregnant after 1 round (I do not ovulate on my own). When we got pregnant with our son- I started ovulation tests day 11 of my cycle- After a few days of getting low (I used clearblue advanced digital). I finally got a flashing smiley face(high) & the following day a solid smiley face (peak).

This time around- I have now gotten a flashing smiley face (high) for 4 days straight. How many days is normal? Has anyone else had this happen?