It sounds like you've had enough for a bit. It's not unusual to have a low point after something like a first go at Oly tri. Here's my advice. Oct 4 is a way off. You already have enough fitness to finish it. What you need is some rest. I was at a low point like this once and the answer was 6 days off. No training. For every hour I would usually spend training... I would sleep instead. At the end of the 6th day I was raring to go again.

Keep us posted.