As of 1/21 I'm pregnant 🤰🏽 and I'm nervous as hell! Please help!

Hey all, 1st of all, I want to say just how much I love the eve community! Now on to my questions that I have😊:

I took 3 pregnancy tests and they all came back positive,so I went to the doctor to start my care plan. I went to do a final prego test (blood test). The doctor said that my gestational sac is telling him that I'm 5weeks, but no yolk sac was visible during my ultrasound from yesterday. Moving on, my hcg blood test said that my hcg levels are 6,498, is that ok?? This is my first pregnancy so of course I'm freaking out because I don't know about this stuff. My next question is, how do I increase my hemoglobin? How do I keep my hcg rising?? THANX A MILLION FOR ALL CONTRIBUTIONS!!!🥰🥰🥰