I developed "flu" like symtoms during my first two weeks of the herbs. It is just typical that you feel a lot worse during a cleanse before you feel better. If you do have the flu, antibiotics won't help because the flu is caused by a virus. Also, antibiotics will kill off your good bacteria which might be one of the things holding down the bad things from over growing. There is a battle for food in your body and if you limit the good bacteria for instance, that just frees up more food for fungi and worms.
Going to see a doctor won't be a bad idea if you feel the need to but I can honestly see them telling you the herbs are causing all the problems and you should just go off them. Maybe decrease your dosage for a while or take a break?
You might be going through a healing crisis: