Depending on the laws of where you are at, you'll either be paid immediately after termination or on the next pay day. If you haven't gotten it, call. There's probably a check with your name on it in the office or whatever. So call and be like the good sis Riri
If they fired you then they were supposed to give it to you at that moment. They are your wages and it's illegal for them to not give them to you. You can also request them to mail it to you instead. I wouldn't call HR though. They work for the company, not you. I would call your labor department.