I had a panic attack last night for the firsttime in a year just wondering could it be the cough medicene just started tussinex/codiene? or stress

Yes to both / either: Physiologic stress like acute illness can worsen anxiety and result in panic, cold medicines can also do this (especially if have decongestant), plain-old life stress can absolutely increase anxiety and bring on panic. You should discuss the event and recent surrounding issues with your dr / therapist / counselor to see if there is a likely trigger that you are missing, or if meds / illness.

Yes.: The narcotic in tussionex can cause anxiety and agitation. Therefore, that might be the cause of a panic attack.