I just started noticing my 10 week old becoming very attached to me and will not let strangers hold her.. or even talk to her. She'll start throwing a tantrum immediately. She is primarily with me 24/7 and her dad maybe plays with her not more than an hour a day... she even cries when her dad talks to her. I'm trying to bring her out more and introduce new environments, but she can't settle down and just starts crying (I feel really bad because everyone's just staring at me, expecting me to shut her up)... is this a phase?? How can I help her be more social?