Everyone in my sub division has been "SICK"?

I know about 85% of my neighbors and we have all been feeling poorly for a the better part of 2 months. Whatever it is, seems to come and go, Nausea, Diarrhea, extreme fatigue, loss of appetite. This includes all ages and just never seems to ever go away. after a bout for 48 hrs I tend to feel as if it is going away but it returns within 24 hrs. Now, 3 months ago a tanker truck was spraying a chemical on the side of the road, I assumed it was a weed killer (defoliant) and I called the county supervisor and he said he didnt know anything about it ! But as I reflect back all this stuff started withing a few weeks after this stuff was sprayed ! The County said contact the state the State said the county is responsible for maintaining the growth on the side of the highway ! Nothing but finger pointing from one to the other agency. Should I get with the EPA ? i think this is what is making every one sick as we all have to drive into the Subdivision just off the Highway ! one way in one way out ! Grady county, Georgia.