Research traditional offerings for this Daimona and Theia. Read her epithets, her surnames, look into her symbols, her linage, as well as her decendants. What of her siblings, Roman equivalents, the Goddess oppisite of her, and the very definition of her name? Also, since she is a Hellenic Deity, do you know the proper way to cleanse miasma before prayer? Do you know if she is Ouranic of Khthonic? This will effect how you give offerings so it is important to know. Just some food for thought from someone whom is a devotee of hers and who highly respects her. If you have been honoring her for three years ...what have you been offering her this entire time?
Here are some links to websites with ways to honor Eris as well as information about her, the first one has a meal blessing which could be a good starting point if you wanted to work with her in the future. As well as a way to honor her. You could find out symbols of hers and if possible have one in your room or home. For example I honor Hecate symbols of hers are things like keys and lanterns, so I happen to have a bunch of old skeleton keys and an old lantern in my room as a way to remind myself of her. You could also memorize her stories and remind yourself of her when you tell them to yourself. You also could meditate to her and ask what she would like as offerings.
https://www.adf.org/articles/gods-and-spirits/hellenic/eris.html (Meal blessing and background information)
http://www.theoi.com/Daimon/Eris.html (Information that goes deeper into Eris's history, such as her parents, her offspring , and stories of her such as Eris & The Golden Apple of Discord.
The Erisian Creed : https://thegoddesseris.wordpress.com/worship/erisian-creed/
(You could use this as a prayer to her)
Also silent siren what's is your deal with me housntly and in response to your sarcastic comment off what have I been offering what ever I felt would be good insences like jasmine dragons blood strawberry sandals wood good like chocolate or alcohol anything I have and could get at the time