Ok lately everytime I have become lucid in a dream, no matter what I do like within ten seconds(if not almost immediatly) of becoming lucid everything starts to go black and I can't do anything.
The first few times I had experienced it I felt I was going to black and to get out of it I would awaken.

Then after quite a few times of this I though maybe my eyes were just closed in my dreams, so I opened my eyes and I saw my room, but I had trouble keeping my eye open and it would close, so I was like alright, unless I open my eyes and do something I cant be sure that im really awake. So I open my eyes and I was really awake.

I did have one dream where I became lucid and it started to go black, but then it stopped and I did like 50 RCs becasue they kept failing but I knew I was sleeping, then after I was ready I tried do do stuff and I couldnt do anything, I tried to teleport, no luck. I tried to summon people, no luck. I tried to use powers, no luck. I was trying pretty hard too and I was very lucid,

Any suggestions on how to regain ability to control my lucidity?