Anyway - shocking that you discovered that, particularly, as you say that it was promoted for pregnant ladies! I was warned by my reiki healer that i needed to get proper and pure oil as sometimes they weren’t. Was desperately in need for healing post natally and was lucky that she was able to give me some of her supplies as a therapist. I hadn’t realised quite how awful the non-pure oils were.
There is a fabulous lavendar farm in yorkshire which i discovered on my way to whitby. http://www.woldswaylavender.co.uk/ Hopefully they can provide you with the real stuff!