Help!!

So the guy im seeing and i were smoking and drinking decided fuck it no condom as soon as we sobered up we got plan b realized it was a mistake 6 days later we were having protected sex and the condom broke so I had to take another one how bad is this gonna mess up my cycle? Pharmacist said ill be fine but i extremely nauseous and having really bad cramps. I dont need you should be more careful comments cause i know how yall are