Keep trying. Almost everybody has control issues from time to time. Hell, every now and then I will have a lucid where I can't even fly.

Keep trying to manifest stuff in any way you can think of and eventually you will succeed. You don't even have to try a new technique every time. You may fail 20 times in a row to manifest a sandwich by "expecting" one to be behind you, but on the 21st try, it may work.