I often feel dizzy when I lie down and get up.

Two months ago, I had a health check at the public health center, and my hemoglobin level was 9.9. So I thought I might have anemia, and lately, I often lie down and when I get up, my vision blurs and I feel dizzy. I hurriedly ordered iron supplements. If I take the iron supplements properly, will I be okay? I think I should have another health check later.