I'm a soapmaker, so I've learn a bit about essential oils, although I still have a lot to learn.
Orange Essential Oil makes you more suseptible to the sun rays. If you use it, do not go outside.
Lavender is safe for most people. However, if you are prone to strokes, it can be dangerous.
I know that those baths are very pleasant, but please research the properties before using. There are tons of info available free online, just do a google search.
Also, not all essential oils are bad for pregnant women, but again, it's important to be informed first.
Even picking some herbs, plants, etc. can be dangerous if one is not informed.
Finally, just because a major company sells it does NOT make it safe for you. Remember that each one of us is unique and reacts differently.