HELP I NEED ADVICE :(

I have no idea what to do for the past 3 days I’ve had pretty bad headaches now tonight I feel extremely nauseas I can’t even lay down because I feel like I’m going to puke and my body just feels so off , my temp is 96.2 so I don’t have a fever but I’m just so terrified that I have the covid 19 virus and I’m going to pass it to my 3 month old son he is exclusively breast fed, What should i do ?