Hello and sorry to hear of your pain after the flush.
Hubby did his second flush Saturday night and Sunday. He was feeling no pain on Monday morning and happy as could be. He passed lots of soft stones, maybe 200 or so. (He's not much of one for "fishing" the bowl and counting.) Same with first flush. He passed one larger soft mass this time about a half inch long, only in an oval shape. He was diagnosed by ultrasound over a year ago with a 2.6 cm stone. He hasn't seen that stone yet in his two flushes. But, my point here is, on Tuesday afternoon he started getting severe pain again in his gall bladder area. He's sure that there's a stone that tried to come up but got "stuck" in the bile duct. Due to his tremendously busy work schedule he is unable to get off work, so he's enduring the pain and is going to schedule his work to stop for a day and 1/2 so he can flush again tomorrow (Thursday). So, it will be only about 5 days in between his flushes, but he's eager to flush again to rid himself of this pain.
Just wanted to tell you of his experience and what his plans are. Hope you can get rid of your pain and get straightened out!