When it gets to that point, you need to change how you reality check. I used to be like that, too, and never got lucid. Try this, instead.

"Am I dreaming?"
At this point, pretend you are in a dream, and the only way you will become lucid is by doing a conclusive reality check.
Look around the room and check if anything is out of the ordinary. (This is mainly just to increase your awareness)
Once you feel you are aware of your environment, do a reality check. I don't like the clock check because it never worked for me. What has worked consistently for me is the nose plug RC.

Before you do the RC, establish that if you can breathe in, you're dreaming. This ensures that you don't draw the wrong conclusion from the reality check.

Also, if you can remember very recently doing a reality check, don't do one. Only do them when you can't remember how you got to the place you're at in the span of time since your last reality check.