just dont push it. u both will be fine if u really love each other. keep talking to her like nothing never happen she'll eventually will return back to normal to the relationship. next time, take it easy on her. dont drag her ito so many question if u dont know what her moods are. things are more easy if they are not explained so complicated. use a plain language to bring things to her attention. as far she getting proffecional help, just wait for the right moment and talk to her about it. do it in a very normal conversation and never disreguard the possibility of u also getting help.