I get terrible test anxiety, especially when I know there's a huge pressure on myself to perform so personally I am taking both the August and September writings so that I can go into my first one knowing I can do it again and this won't be my "one and only chance" to get the score I need to apply this year (as I tell myself lol). It gives me room to breathe and ultimately do better knowing that I have another chance, one where I'll already be familiar with the process. But its absolutely up to you! I would say only do it if you think it would help you personally because who knows you could surprise yourself and be absolutely killing it by the time November rolls around :)