You are right...I should monitor this throughout the day. Right now it is just a dull sensation which could be just post-flush stress on the area.
If it turns out to be a stuck stone with moderate pain, should I just try Epsom Salts alone? Will the ES be enough to release the stone if this is the case?
Regarding my flushing timeline, my second flush was about 8 or 9 days after the first (couldn't wait any longer due to pain). My third flush (last night) was performed about three weeks after the second.