Dear Lief, reading through your report it occurs to me you might have missed many opportunities to experience a perfect WILD and OBE.
The time you actually saw picture is the first sign of getting into a WILD. You see, it’s normal for the first few repetitions to not feel anything, but usually each repetition will bring you closer to the correct mind/body state then you will start to get sensations. When you do experience strong and distinctive sensations like this, you should immediately cease the exercise and focus on the sensation instead. By focusing on it the sensation will increase, assuming you are not getting too excited and break out of the trance. In the case of yours, the image you saw will eventually become bigger and brighter. At which point you should be able to do a nose RC and it usually will work. Or, you can try reaching out to the scene and that usually will allow you to zoom right into it and becomes a dream.
Another place you missed an opportunity is when you felt the rocking sensation and some vibrations. Again, you should have stopped the exercise and focused on increasing the sensation. When the range of the movement becomes bigger and bigger, you are already in a perfect condition to experience an OBE. Just do a quick nose RC and you should be able to roll out of your bed.
Don’t despair, as you become more experienced to these sensations you will eventually be able to grab them. You are actually on the right track judging from your experience.
About losing sleep… typically when doing SILD, we do not expect to experience any sensations. That’s right, you heard me correctly – we ARE NOT striving to experience anything while doing the exercise! It’s the action that matters, not the result! It is perfectly fine for you to not feel anything. Just finish the cycles, become plenty relaxed, and drift to sleep as quickly as possible. LDs and OBEs will come automatically at later stage. If you do it in this fashion, these exercises will actually help you sleep! On the other hand, if you focus too much on the sensations, you will become too eager and tense, and that will result in difficulty to fall asleep afterwards. In your case, it’s even worse because you were literally on the verge of WILD and OBE and you broke out of them