I am just soooo sleepy

Since I have been working on cutting out the bad and putting in the good, I have become exhausted. I feel so tired all the time and my migraines have increased. I wondered if this was normal. I have read a few things about detoxes. Maybe this would help boost my system by getting the bad stuff out faster. I am not sure. I do know that I want to sleep at least 12 hours a day.