Itching at bedtime

So last night Ruby got pork for dinner.. she itched twice not too bad after, but the worst part was at bedtime.. once she got into bed she itched for a long time , woke up and itched later on, and then this morning itched like mad... the new comforter i have on the bed was not washed in allergy free detergent, so i am going to wash it today hoping that was the problem...