What's going on here?

[Indecent Exposure]

Okay, so recently I've managed to execute the FILD technique successfully with some element of regularity. Maybe once a night for the last four or five I've managed to successfully enter the dream state using FILD. The problem occurs for me after this point; as soon as I do the reality check and realise I'm lucid, I can't move. All my FILD's end up with me lying in my bed. The room generally is relatively clear, but it feels like I have invisible bonds stopping me from getting up and out of bed. Last night I thought I would overcome this problem by being more patient and attempting to stabilize my dream whilst in bed before attempting to move. I decided that I would look at my hands; but when I looked down and put my hands out, they were invisible. I had no hands, So after that I decided I may aswell try and get up, this is where I feel these strange preventive forces and my dream loses any visual clarity and the scene begins to fade. I'd love to hear from anybody who has experienced and overcome similar problems in the past. Cheers