my daughter wants to suck all the time

Aashna

my daughter is 3 weeks old now. After being fed well and burped she still wants to keep sucking. at first I thought she wasn't fed well so I fed her again only for her to throw up and she still refused to give up on her sucking. I gave her a pacifier for the first time today and she wakes up every 10 to 15 min from her sleep. could it be because of the pacifier?

P.S I am a first time mother.