people are a bit luckier these days, years ago, if you failed or didn't get the marks you needed in IELTS you had to wait 3 months, yes 3 months b4 you could take the test again and my misses would find all the dates after the 3 months wait were full so you had to wait another month or 2, (so if you didn't get the grade you needed you could be waiting a long 5 months b4 you could take it again - unbelievable ) that's one of the reasons it took my wife more than 5 long years to get registered as a doc
it wasn't long ago they scrapped the 3 month wait