Hi AleMene,
First off, a 700/Q47 is already an outstanding Score, so you can comfortably apply to any Programs that interest you. As such, a retest might not be necessary. Since you are interested in some highly-competitive Programs, you would likely find it beneficial to speak with an Admissions Expert about your overall profile and plans. Those Experts should be able to answer your Admissions questions and help define the specific areas of your profile that could use some improvement. There's a Forum full of those Experts here:
https://gmatclub.com/forum/ask-admissio ... tants-124/At this point, Schools all seem fine with the concept of the At-home GMAT Exam - and no School or Program has voiced any major concerns about comparing that Score to a traditional result from a Test Facility. There's no way to know if that perspective might change in the future though. All things considered, if you apply at some point within the next 5 years and you are a strong overall applicant who took the At-home GMAT (and scored well on it), then I would assume that a School would not "look down" on your application because Covid-19 may have essentially 'forced' you to take the At-home GMAT.
Since March 18th is just a little more than 1 week away, you have to be careful about trying to do too much studying before then (and trying to 'squeeze in' ANOTHER Official GMAT is probably NOT a good idea). The process of taking (and reviewing) a CAT/mock (or taking the Official GMAT) requires a significant amount of energy and effort - and takes time to 'recover' from. This is one of the reasons why you typically shouldn't take more than 1 CAT per week - and your last CAT should be taken about 1 week before Test Day. From what you've described, you have already taken 3 CATs in the last 10 days - and we do not want you to accidentally "burn out" before your Official GMAT on March 18th.
You could potentially take one more CAT in the time remaining and general study/review would be fine (although again, you should not try to do too much studying - so "cramming" would not be a good idea). In the last few days before your Exam, you should limit your studies to general practice and light review - you would be better served by getting some extra rest so that you can go into Test Day calm, clear-headed and ready to work.
GMAT assassins aren't born, they're made,
Rich