Hi Karen and welcome to the forum!
When they first diagnosed mine, I was in the moderate/severe range also. It took about 20 months to become severe for me, but aortic stenosis progresses differently depending on several factors.
I would encourage you to stay active and exercise. I exercised right up until the day before surgery. It is best to go into surgery in good physical condition, than to go in sedentary. Of course, if your doctor tells you not to exercise, listen to him, but it sounds like he has not given you this instruction. It is almost always ok to at least do brisk walking.
That's a concern. When you say that he checked you out, does that mean that he referred you to getting an echo? If he diagnosed you as moderate/severe AS, I expect he probably did so. At moderate/severe, you should be getting echos every 6 months at least. It is problematic that he waited 6 months to communicate to you that you have AS. While you are waiting for your cardiology appointment, he should order another echo. It has been 6 months and it is time for your next one. You could very well have crossed the line into severe in the past 6 months, but no way to know until they get an echo or an MRI. It would also be good to go into the cardiology appointment with a current echo, instead of one that is 6+ months old.
If it will take months to see a cardiologist, I would consider travelling to see one sooner.
The good news is that there is a great solution to your problem- valve replacement surgery, which has excellent outcomes.
At 67, I would fully agree that a biological valve is the best choice and given that you have shared that you are contraindicated for warfarin, it is really the only choice. If I was 67, I would probably opt for the Edwards Resilia valve, which has been treated to delay the calcification process. It may very well be the last valve that you need. Also, it is designed to accomodate a future TAVR valve. If you do get to the point of needing another procedure, you will likely be in your mid to late 80s and a TAVR would probably be optimal. But, at 67, I would not yet consider TAVR.
Best of luck and please keep us posted.