There isn't much you can do but wait. Do NOT make yourself try to vomit!!!!! I did try to vomit, not trying to, after taking a pain med that I reacted to badly. It caused my wrap to migrate, and now I may have to have a re-do.
If you have pain after this calms down, and it will, you need to get a barium swallow to check on the wrap and see if you've re-herniated.
I keep some paregoric on hand to prevent vomiting, when it's too late for Zofran. It stops the spasms instantly. (It works on intractable coughing too.