I had the same problem you're experiencing, regarding nausea (except I actually did throw up every time I ate a solid meal before working out, not to mention waiting for 2 hours after waking up to work out was extremely inconvenient for me ). Try replacing your breakfast with a liquid meal. You may still feel somewhat nauseous, but it's a lot easier to hold down.
Alternatively, if you're doing cardio that results in less than mildly heavy breathing (a perceived exertion factor of 6)--you can easily hold a conversation and do not lose your breath, but are breathing heavier than you would be if inactive)--try doing cardio on an empty stomach and eating immediately after. I find I get a more natural and invigorating aerobic workout on an empty stomach. If you're doing your cardio at a higher intensity than that which I described, consider decreasing your intensity, or try the liquid meal (for your size about 10g protein/20g carbohydrate) recommended above.