Help I'm nervous

Shilo

I am 11 weeks today and so far this pregnancy I have lost 10 pounds. I can't keep anything down . Well the last few days I'm only throwing up dinner and my boobs are not as swollen. Should I be nervous? I'm scared. This is my 4th pregnancy and 3rd baby. I lost the last one at 6 weeks so I am nervous. Please let me know that this is normal