Flu like symptoms at 4weeks?

Chelsea • Hi! I’m Chelsea! 25 years old Happy wife! Mommy to a sweet little boy

I found out I was pregnant on Sat. Dec, 2. I've been having flu like symptoms since Monday. Body aches, cough, congestion, nausea & occasional vomiting. I was just wondering if it was normal to feel this sick so early on & if I should be concerned? This is hubby & I's first so I really have no idea.