That sounds horrible, John. I've experienced impaction and it is just the worst. What helping me, in addition to the OTC oral medication, was to use a glycerin suppository. Sounds gross, I know, but I was in such pain it didn't matter, as long as it helped. And it did!
If that doesn't do the trick and you have an urgent care in your area, I'd suggest that as your next stop. And I sure wouldn't wait a week or two if I were in that kind of pain.
Take care of yourself, drink water...