If you vary from morning to night by more then 15-20% then you are also out of control. Ex. your
best is 450, but your read less then 360 (80% of
best), then you are not in control. If you don't know your best, it would be very hard to determine right now, because you are quite symptomatic.
I don't know what else to offer, except make an appointment to see your family doctor, due to ongoing daily asthma symptoms and see if he/she can improve your symptoms.