Will I lose my cardio stamina since I can't run for 2 weeks?

I normally run about 3.5 miles per day, but I had jaw surgery on Friday and can't do high-impact aerobics for about 2 weeks. I've been walking my usual jog route, which takes about twice the time. When I try to run again, will it be extremely difficult? Do you think the walking will help me stay in shape... show more I normally run about 3.5 miles per day, but I had jaw surgery on Friday and can't do high-impact aerobics for about 2 weeks. I've been walking my usual jog route, which takes about twice the time. When I try to run again, will it be extremely difficult? Do you think the walking will help me stay in shape somewhat?

Thanks!
Update: I don't have a bike or gym access, so cycling is not an option, unfortunately.
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