Not really.
Your score is sent to med schools and it’s supposed to be one and done, although you can take it once more a few months or a year later without penalty if your score isn’t good enough. But for best odds, you take it in early Spring when you’re sure you’re ready, in order to be able to participate in the earlier rounds of application.
However, unlike the SAT or ACT, you cannot take it twice junior year to see, again August senior year, once more if needed… and there’s just ONE test, not two you can try out to see which one would “fit” you best.
Also, the test is 7hours and 30mn so it’s not something you just take casually.