The sensations are normal. I'd suggest try a longer WBTB, or a change of your WBTB activities so you aren't so alert. You want to be close to sleep when you start the WILD, so that you slip into the dream more quickly. You can also try adjusting your WBTB+WILD attempt earlier or later in the night. If most of your WILD attempts end up with you still awake, irritated, and giving up, then that's too much on the alert end. Adjust toward the end that most of your WILD attempts end with you falling asleep unknowingly (which might have a higher chance of DILD too). When you're more sleepy, it's easier to ride the hypnagogic sensations and remain calm through the transition.