Might take a bit longer than that to clear...might I ask do you get really eggy smelling burps as well?
About this time last year I had a weird gastric quirk, if I ate anything late at night (student lol) and then only got 2-3 hours sleep I could time it like clockwork that within 24 hours I would start getting gas, cramps, the runs and it would last about 16 hours. I started taking something called Benefibre, think the LT safe version is called Fibresure/Fibreclear. Within a week of taken the stuff the problem disappeared and since then its never come back after I made a small adjustment to my diet.
I'm not a medical practitioner but from experiance if you've both binged on 'sloppy' stuff before starting LT then it could just be a digestive 'slag' (as in by product from steel production, not a woman of low morals lol) stuck in you causing you problems.
I'd personally just stick it out, best to ring LT or speak to a doctor if it becomes a serious concern though.