Hi Tippi,
I think it is generally accepted practice for massage therapists to use 'simple' choices of essential oils to enhance the carrier blend i.e. Lavender, Geranium etc. However you should not offer anything to a client that could be construed as a 'prescriptive' use of oils (single or in combination) i.e. using specific oils in response to symptoms presented by a client until you have completed your Aromatherapy course. Even if using basic essences you should still consult the client to make sure they do not have any known allergies/reactions, avoid oils that will sensitise the skin to sunlight (citrus family lemon, bergamot etc) and I wouldn't use any additives on any pregnant clients.
I personally would advise against advertising 'Aroma Massage' as this will probably be interpreted as Aromatherapy by less-informed clients which may cause problems, but I'm sure other forum members have been down the same route and can offer better advice than mine. I've a legal/professional background in addition to my 'holistic' side, so I tend to err on the side of caution!!
You should note that your insurance almost certainly will not cover you for professional use of 'complex' use of essential oils without qualification first.
Good luck with your practice & your next course.
derekw