Seven weeks five days....

Erica • Second pregnancy first viable!!! Unplanned but we're both really excited! Any advice or encouragement is appreciated!🙏
I'm at nearly 8 weeks, morning sickness all the time! I eat as much as possible but can keep hardly anything down with no rhyme or reason what stays in me! I've only gained .9 lb :-( Before I found out at week 5 I was rapidly losing weight! Almost 7 lbs! Am I gaining enough? How will I ever gain weight if I can't eat!