6 1/2 weeks and feeling horrible

Ha

Woke up this morning like normal. But as the hours passed I started feeling bad. Feeling weak, sore, and my belly hurts. I took a nap and woke up feeling even worse. So once I woke up and moved around some I started to feel a little better. Still feeling weak and nauseous and sore. What is going on? I’m getting a bit worried that I feel so bad.