The most important thing is that you are honest. Take any info that you have about your condition. Remember, they have your best interests at heart. You'll fill out a form, and they will ask you questions about your condition/illness. Just be honest and you will have no problem.
I have gotten my recommendation through medicann for several years. I have found them to be compassionate and helpful in informing about medical marijuana and how it can help you.
Best wishes, and please let us know how things went.
Peace and mmj