Hello
I found this from this online iBook article which I thought might be helpful. I think Black Pepper essential oil would be very helpful.
"....The essential oils that resonate with the solar plexus chakra are mainly "protector" oils. They include Vetivert, Juniper and Fennel. Vetivert is a protector and balancing oil, as seen with it's affinity with the root chakra. However, it's most important role within the chakra system is to act on the solar plexus chakra to protect from over- sensitivity. Applying Vetivert to the solar plexus chakra prevents one from becoming a "psychic sponge" and taking on other people's "junk". If you find that you were in an uncomfortable situation where you felt other's energies intruding on you, Juniper will help clear them. Fennel acts as a protector oil, similar to Vetivert. Rubbing Fennel oil over the solar plexus chakra can help when you feel the threat of "psychic attack".
It is through the solar plexus chakra that we are called to action. An imbalance in this chakra may result in a feeling of being "stuck". Black Pepper moves one into action at such times. It helps move blocks that prevent movement of energy between the chakras, especially the solar plexus and the heart.
Lavender, with both a calming and energizing action, has a strong affinity with the solar plexus chakra. Lavender's role in the solar plexus is to help calm extremes of emotion...."
The link for all chakras & more info:
http://shamanicconnection.com/articles/Aromatherapy-and-FlowerEssences.pdf=")