I think I have a parasite. My mouth is dry, and I frequently feel something in my throat like ascending bubbles which are kind of ticklish, and tickling on my anterior chest close to my sternum. There is a lump on my the anterior of my neck on the right side, it is palpable, and it is only on the right side, not the .Also around my anus I can feel something like a very miniature "explosion" and this is happening like every 20 seconds. This is happening around my pelvis, close to my anus, and near my stomach.