I am six week pregnant and i make ultrasound last...

Is this normal ?
there is no clear vision for the current pregnancy sacs in this time of pregnancy , and doctor can make sure of your stage of your pregnancy or if there is any abnormal pregnancy situation 
What do we suggest ?
1. stick to your doctor advices 
2. do the following tests :
- pregnancy hormone test ( now and after 2 weeks ) 
- ultrasound test after 2 weeks 
What are the normal levels of prengnancy hormone in first weeks of pregnancy ?
1. 3 weeks from LMP ( last menstural period ) : 5-50 
2. 4 weeks from LMP : 5 - 426 
3. 5 weeks from LMP : 18 - 7340
4. 6 weeks from LMP : 1080 - 56500  
5. 7-8 weeks from LMP: 7650-229000
6. 9-12 weeks from LMP: 25000-288000
7. 13-16 weeks from LMP: 13600-254000
8. 17-24 weeks from LMP: 4000-165000
9. 25-40 weeks from LMP : 3000-117000
General advices :
1. stick to your doctor advices and instructions
2. avoid any physical activity and have plenty of rest
3. avoid smoking and alcohol
4. have healthy diet
5.dont take any pills or medications without doctor consultation