22/M having a hard time adjusting to 21/F priority change.

I've been dating this girl for just over a moth now and everything has been going amazing. Lots of love and attention both ways but recently she has been having a hard time at work. She has pulled a whole 360 on me for the past few days we have barley been intimate and it's taking a toll on me emotionaly she used to want me over her place every day and night was allways all over me. Now nothing she has told me that she normally isn't the lovey dovey type and what she is like now is what she is normally like. And I don't know if thats the girl I fell for. What do I do wait it out? I'm loosing sleep over this please help.