Maybe try it also on your anxiety, wiredness, and your other symptoms because even though they all are likely connected to the drug, EFT may really help you to deal with the intense feelings that you are struggling with.
The more you use it and try it on different things, the more you will know exactly how it could work with you. Also you'll get faster at it and get better at focusing on the particular negative that you are trying to neutralize as well as the "peeling the onion" of particular issues. (As most strong issues are not really plain and simple.)
I find doing it to be sort of relaxing almost like meditation or prayer, in that you are 'centreing' yourself- your energy and doing it gives you 'something concrete' to do with all of the emotional energy that is affecting you. Does that make sense? It sure helps me.