I have a question

My uncle tested positive for covid, he was staying with us for a couple of days. And we went to a party and the next day me and my cousin and uncle started feeling sick. Today, he tested positive but I didn’t. My cousin is getting tested tomorrow. Am I still able to go to school. I also do have covid symptoms but maybe I tested to early. If I’m not able to go to school, how long do I stay home for?