Is it the drugs?????????????/?

my girlfriend and i have been dating for four months. she became hooked on snorting heroin three months ago, then went through detox, and has been trying to stay clean for the past 2 weeks. before she went into detox our sex life was great, but now she wont even hug me, she says that she is just not in the mood and it has nothing to do with me. is this do to her not being on drugs, or has she just lost intrest in physical attention? if it is due to the withdraw of drugs, how long will she be in this depressive state of mind?