Early pregnancy and can’t sleep well

I took a test at day 12 post ovulation because I knew in my gut that I was pregnant (Felt cramping, nausea, frequent urination). The test confirmed it! :)

For the past two nights I’ve been unable to sleep very well. Waking up at 3:00 am and unable to go back to sleep. The non pregnant me would sleep consistently the minute my head hit the pillow.

Is this insomnia a hormonal thing, or me just being anxious?! Has this happened to anyone before?