HI Tom,
My honest opinion is that it would be a good time to consult a specialist. There are a variety of other things which will kill candida, but there are a lot of issues with some of them, such as eventual yeast resistance to either the drug or treatment used.
Many people are now put on rotation therapies in any case, especially in cases like yours where they have esophagal ulcers as well as candida issues. Other possibilities which might help with the ulcer problem would be a caprylic acid tablet (Solgar does a Maximized Caprylic acid tablet) as well as aloe vera (which should be very good for your esophagal ulcers and is anti-candidal).
However, in advanced cases, most of these treatments need to be monitored, continued, and rotated bearing in mind the patient's specific conditions. That can really only be done by a qualified practitioner and it's not really ideal to do it just over the internet.
Of course, we're all happy to help and there are things we have tried which can help (e.g. pao d'arco tea) but most of the candida treatments are long-term (several months anyway) and rely on a combination of factors to work properly.
Generally, my practitioner has said that coconut oil alone, garlic alone and diet alone won't do it. You need a proper treatment plan ideally. In my case, I'm only taking GSE every other day, with Candicurb (Goldenseal plus a mix of other anti-fungals) on alternate days.
In your case, the best thing would be to find a qualified practitioner with experience in treating candida and then see what he suggests. Usually they take all your pre-existing conditions into account and so will suggest something suitable which won't adversly affect your ulcers!