Essential oils and fragrances safe to use?

My mom got me an oil defuser for my birthday with some fragrance oils, but didn't ask if they were alright to use when she was in the store. I've been looking online but there's no clear cut answer. Any one know if it's safe or not? I'm still in the first trimester.
They're from Earthbound, and it's Heaven and Tranquility. If anyone's familiar. 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors