Insomnia in early pregnancy

Hey everyone, so I'm about 5 weeks along and I can't sleep. Every night I fall asleep between 1 and 2 and I wake up between 4 and 5:30, no matter what. I have the worst headache from being so tired and I have no idea what to do as I cannot get a doctor to call me back. I'm worried if this keeps up I won't be able to go to work or anything and I'll have a miserable pregnancy. Someone help 😣