sainsbury

can someone give me advice im panicking at moment at work today sainsbury i was on my own doing a shift on counters i was really busy trying make loads pizza orders as well serving hot food anyway about 15 mins some staff member came over and says whats that burning im looking round cant figure out anyway someone on deli next to me realises pizza base cardboard fell on to pizza capper and burnt it assistant store manager comes over and says alarms are sensitive i went ok im sorry he takes cardboard with him to his office and nothing been said since apart from when it was nearly end of shift he says it was a lucky escape anyway now im panicking will i get sacked over this im terrrified of going into work on saturday as my department manager will be in and store manager wouldnt let me throw cardboard base away this is making me ill