Failed my IPPT window, what actually happens now?

Relax, this happens to loads of NSmen and it's very manageable. What typically happens if you don't pass IPPT within your window: you'll be booked for RT (Remedial Training), a set number of sessions you must attend and complete within a deadline. It's not a criminal charge or a fine as long as you turn up and finish RT, the issue only becomes serious (chargeable as an offence) if you keep missing RT sessions without valid reason, that's when it can escalate to disciplinary action. Practical steps: log in to the NS portal, check your RT booking status, and book your sessions early so you have buffer. Use the RT sessions to actually train, many people pass IPPT during RT itself because the sessions build you up. If you have a genuine medical issue, see the MO for a possible deferment or RT-Medical. The stress is worse than the reality, just show up and clear it. Also start jogging and doing push-ups now so next cycle you clear the window directly.