Worried. 7w pregnant with no increase in appetite/no weight gain. Normal?

Sara
Hi all! 7 weeks pregnant... but I feel completely normal.  Since the beginning, I haven't really had many symptoms except sore boobs (no morning sickness, etc.)  I also have not been any more hungry than normal and am eating normally... No weight gain yet. I'm 5'7" and 145lb. I'm worried - is this normal? Worried my hormones aren't surging as they should. Has it been this way for anyone else?