My mom's had afib pretty much her whole life ... it can usually be pretty well controlled. At least in her case.

She did go to the er a few years back and they did some tests, admitted her and wouldn't tell her anything until the dr could see her. Long story short she got a pacemaker and has been good ever since ... but in that advent it was an admit to hospital asap.

In your case ... if they're waiting a few weeks, it can't be super serious.