Hi
I've not experienced exactly that myself but when I was taking utrogestan (now got mirena coil) I found that taking them at bedtime, as advised, left me wired for a couple hours and unable to sleep. So I changed the timing to mid evening, couple hours before my normal bedtime and this helped me.
If you're wired for hours after you could try taking them in the morning?
Another thing is, particularly as you say you were dazed when you read the instructions, are you making sure you take on an empty stomach? Not sure if food would cause your symptoms but worth making sure you do take them correctly.
Good luck in resolving your problem
Suzie