You need to pass any NBME by 10 points before you pay money . Don't pay money until you reach this point . Then you don't have to ask for postponement. Then plan your revision and pick date .
No plus 200 in any NBME no paying the money. You not ready .
Yes it is still not clear when to pay .
But now you have an idea . with a result of 200 plus
You can work out how long you need to do repeat readings of uworld /FA
and accordingly pick the 3 month period You not obligated to pick the immediate 3 months .
You can pick a 3 months period that is 2, 3 months from now or more .
You can make lots of judgements from this point .
Remember you cant go on stuyding indefinitely . Also you near writing
once you get to 200 . 2 more readings is all you need to get there
Shouln't be more than 2 months . If you need more than 2 months
something not right.