Hi My Two-year-old Child And Aspirated And Choked On Some

Hi my two-year-old child and aspirated and choked on some powder candy earlier today was fine after we got it all out he was in bed and just got up and started coughing and crying really bad coughing up some junk out of his lungs he seem fine now and we gave him a breathing treatment his oxygen is 99% are wondering if there was anything else we need to do