Ending of home isolation? Her isolation?

My sister had taken iron supplements two weeks ago and it reacted badly with her body. Eight days ago she started feeling weak and feverish. Next day she had black colored diarrhea and we stopped supplements and developed 99.1 F. Next day her temp shot up to 99.8. We isolated her thinking it might be covid although she never ventures out from home. She took paracetamol and from next day she didnt have fever. Today is the third day (without fever temp 97.2-98.8) for her. She has no other symptoms. She was constipated for two days but she had semi solid stool today. Covid testing centre is 30 km away and crowded so we decided to wait. Is it safe to break her isolation? ( Today is 9th day from feeling unwell, 7th day of isolation and 4th day without fever and no symptoms)