I'm a nurse aide and i've was working with a resident. he had mrsa and i was not aware of it. the nurse said it was airborne. now my throat hurts,weak

No worries!: As a nurse's aide, you have been exposoed to MRSA many times before. It's all over the place in hospitals and in many patients, including many without visible evidence of infection. That a particular resident is a carrier doesn't increase your risk. And MRSA doesn't cause sore throat or weakness. If still concerned, speak with your supervisor or discuss with the infection control team.