1. Putting the herbs in water with not dissolve the solid portion of the herbs and the system will still hafta digest/process them. It will make no difference. You also don't know what effect the herbs will have of the cleansing properties of the MC components. More is not necesarily better
2. You'll drop it if you want to get the best result from the MC and not risk the possibility to make yourself sick of too many toxins being released at once. The Humaworm will still be there when you are done MCing.
All citrus fruits are high in vitamin C contents. You are just adding synthetic stuff that your system has to process and who know what effect the synthetic Vit C has on the different cleansing components of the MC and the alkilinizing effects of the lemon.
Your can gargle with salt water to help with your sore throat.