The field sobriety tests were likely stopped for your "safety", not due to "health". The officer may have have mistakenly written "health". "Good health" is not a medical diagnoses, rather a statement that you appear to be in relatively good health. Either way, you should consult an attorney regarding these and other possible issues that may give rise to a defense to the charges.

Possibly. I would have to know exactly what the officer said RE stopping the SFSTs.

The officer who gave the field sobriety test may have stopped it, because she was concerned that you would be injured by continuing the test. Although this could be a person's level of intoxication, it could also be a person's physical disability, weather conditions or traffic conditions that require stopping the field sobriety test.

Keep in mind that it is unlikely that the officers are medical professionals and in position to give anything other than a lay opinion about your health. Regardless, it is not a defense, but you may have others.

I offer a free initial consultation during which I would discuss with you any defenses that you may have.

The purpose of the Field Sobriety Test is for the officer to determine if there is probable cause to arrest your for DUI. There is no legal requirement that she administer the test at all, much less complete the test. However, she does need probable cause to make an arrest, and I doubt that going through the stop sign is sufficient. You should consult with a lawyer that handles these types of cases, like myself, to determine what defenses are available.