Well my husband is very very supportive... checks the symptoms, tells me if he is worried or not. And sometimes i will have break downs, when he comes home and i am crying and everything. But sometimes, he will say things that irritates me, a bit like you. But i just ignore those comments (as they are not often) and that you have to understand he is trying to cope with your hypochondria too, in his own way. No they don't understand, but we don't understand how it is for them too.... i ask my husband to believe that my symptoms are real and that he needs to respect me. Don't laugh about the way I am feeling and everything but well he is not perfect.
Imagine coming home to someone who is always worried, sad... always talking about the symptoms, the diseases... It gets VERY depressive for them too. So i make an effort, i ask him to check the symptoms, i talk a bit about it, we sometimes google :s (but googling with him is never cancer) and them we move to something else. He is not a doctor, not your psy or anything. And truthfully, my husband loves me and cares for me so deeply that if he was worried at all about any symptoms, he will tell me to go to the doctor.
Hope that helps
For the dates, well i wouldn't mention right awat about the anxiety issue lol... a bit of mystery for later on in the relationship