Another consideration is allergy or food sensitivity. Are you sensitive to Gluten (wheat, rye, barley)? Just a thought.
Everybody is different, you can become dependant if you take them on some sort of regular basis but the amount you say you take seems very small to have such bad withdrawls. It sounds more like a bad bug. One thing you usually get with w/d's is hot and cold flashes and a runny nose, do you have any of that?
If it is w/d's it takes about 2 weeks for them to go away once you completely stop the Lortab.
You are smart to be cautious about getting labeled an addict in your medical records. If you are then it's fine and you need some help to quit but if your not, you don't want to be uninsurable someday because of a pre-existing condition. Insurance companies don't like alcoholism or addiction since it always has the possibility to come back and cause other serious medical issues they don't want to pay for.
Here's a thought, stay off the Lortab for 14 days and see if you start feeling better, if you do it may have been the pills. It doesn't take long to become physically dependent on them, trust me I've been there.
Good luck to you!!