Sorry, about the unhelpful response, but your post is well... odd, but I'll go along.
you shouldn't be drinking any recipe I know of after 4 days. You should check the specific gravity with a hydrometer after it has had a chance to ferment. Sounds like you are doing an apflewein, they usually take about 6 weeks according to Edwort's recipe.
Once the gravity is stable for 3 days, the primary fermentation is over, and it's ready for bottling, clearing, etc...
I haven't heard of some one getting a sore shoulder and throwing up from homebrew before, not that it couldn't happen I guess. Remember, correlation is not causation, the events you describe all could have been unrelated. Just saying.
But with out knowing more about the specifics of your process, like cleaning and sanitation, what type of yeast, temperatures, etc... I mean if you didn't have fairly sanitary water to begin with, there might have been something else unrelated to the yeast. But usually things like that are not remedied quickly by throwing up once.
Most people on here do not filter their beer as far as I know. I have made apfelwein and it was very clear after about 5 weeks.
Over all your post suggests you might want to do some more reading, try browsing the stickies in the beginners and cider forums, there are lots of good techniques described there.
There is a book by an author named John Palmer available free on line too. It's very good, if a little out of date.