Am i having normal symptoms of the morning after pilll?

i had unprotcted on monday 2x and on tuesday 1x... wendsday morning i went to the pharmacy and asked ofr plan b.. when i got home i realized it as not plan b..but next choice... i took next choice then 12hrs later took the next pill... within minutes of takin the next pill i had indescribable stomach pains accompanied with vomiting.... did the pill work? also, 2days after takin the pill im starting to bleed heavily with stomach cramps, headaches and im feeling very tired... i had my period last week so im a little worried about this heavy bleeding??