Hi Amandajane
How long have you had the Mirena and the wrong Evorel (conti)? The excess progestogen could be affecting you and making you feel fatigued, especially on top of your own cycle, if you're still having one. Sometimes the synthetic progestogens have the opposite effect though - the side effects of norethisterone are fatigue or insomnia! You also may be experiencing side effects from the limited systemic absoprtion of the progestogen in the Mirena coil too..... Hopefully you will feel less fatigued when you get onto the right patch.
Hurdity x