How many days of “high” on OPK tests is normal? Still no peak... 😬

This is our first time (but I have very very low AMH levels) and I took the OPK test 6 days ago and it was low. Next day it was high and has been high for 5 days with no peak. All my apps say it should have been today butttt still the flashy smiley face. Is this normal? When do I panic lol