This might be an unpopular opinion, but w/o a MCAT score now (and whether the test center would open on your scheduled exam date) you might want to consider applying next cycle (or have a backup plan).
IMHO, if there's an extension of med school deadlines it might be a small one. They can't delay matriculation so the "show must go on" even with MCAT cancellation in the upcoming weeks/months. There are already a handful of applicants already have their MCAT score and ready to apply, so I doubt in reality schools will be accommodating with the deadlines.
I do hope things turn out better though, for the upcoming cycle.