Not feeling good today at all

So I'm 19 w 3d and I don't feel good at all today. I feel a little nauseas, and the bottom of my belly is sore like a giant bruise. It gets worst when I stand up and walk. I feel like I'm dizzy or light headed. I did go to the doctor yesterday and they told me I have mild anemia and gave me iron tablets to take. Has anyone gone through this feeling of being super tired and sore? I just really dont feel good today. Thanks in advance!