My body feels different

A • Trying to work on another one any advice would be nice....
Okay so I took a test over a week ago was negative but has me worried cause I've felt nauseated all day, sick- sore throat/cold, hot flashes, no appetite, boobs feel slightly different I had my first kid 1 1/2 year ago I didn't find out till I was 3 months same thing might happen I took a bunch test when I missed with my first so what should I do!? HELP ME