I think that if he generally is there for you then it’s important in a balanced relationship that he be able to have his own boundaries like prioritizing a really important day at work when you both know that the anxiety attack it’s ultimately temporary, not detrimental, but him screwing up that really important day at work could be detrimental to his career. That said, even though you want a stronger dose of medicine, skipping taking the regular dose that your body has acclimated to is kind of self-destructive.

I have anxiety also. So does my partner. We’re there for each other, but it’s really important that we handle our own stuff to the best of our ability and respect each other’s boundaries, otherwise our anxiety will ruin our life and theirs.

I feel really bad for you, but it's kinda hard to blame him, given the circumstances.