The first thing you should ALWAYS do if you feel like you may be a close contact or if you have COVID symptoms, is to call your medical provider to get direction or information on what to do next.
You have covid, now what?
You are a close contact to a covid case, Now what?
You are a household contact to a covid case, now what?
You MAY have been exposed to Covid, now what? This is for if you are in the same building or workplace, but NOT technically considered a close contact:
I have COVID: how do I notify my close contacts?