^^ Maybe the first step here is to suggest to yourself that it could be possible that you timed it wrong, Reinards. Allowing yourself to question whether you may have missed a bit on the timing might reveal changes that need to be made, while assuring yourself that you couldn't have timed it wrong allows you to ignore possible fixes. Something to think about, I think.

For instance, in this case you did not use a WBTB. WBTB is by far the most important technique for successful WILD's, and not doing one does suggest that you may have gotten something wrong with timing. Why? Well, one of the main reasons for using WBTB is that it is an instrument for aligning your timing for your WILD dive. This is because you tend to wake up immediately after every REM period, and that wake-up is followed by a period of NREM. So, if you attempt a WILD immediately upon waking, you very likely will need to negotiate a period of NREM before your next REM period begins, which can be difficult. WBTB, when done properly, allows you to bridge this NREM gap to land your WILD attempt within a REM period, with no wait.

Also, as I think I already said, attempting a WILD right after waking up from a dream is actually not a sign of timing it right, but just the opposite. You really need to have that WBTB pause (minimum 15 minutes, max 1hour, generally, if done after 5 hrs' sleep) both for the reason listed above, and also to gather some waking-life self-awareness, so you are properly prepared to WILD. Trying a WILD immediately upon waking tends to have one of two effects: either you simply go right back to normal sleep, because you were never quite awake enough for a WILD dive, or you will have a successful WILD, but will emerge into NREM, which, with its lack of dream imagery, might be very difficult to lucidly navigate (However: Later, however, when you have a better handle on the WILD process, you might find NREM lucidity very interesting; I do).

So there may have been things you did wrong regarding timing. I hope you might consider this, and, more importantly, that you allow yourself a chance to question whether you did something wrong.

[As an aside, this all goes for SSILD attempts as well, because SSILD is actually a WILD technique.]