It takes practice. Even with a fever, head trauma, neuropathy, back pain, headache, and many other conditions (not necessarily all at once!), I can get to a "floating" phase almost immediately. I had a great trainer, though.

If you can't focus on only that one "exercise" and can't ignore the physical issues, you'll have a tough time. It's not impossible.

Try to seek out a licensed hypnotist or psychiatrist to help.

Annie