<human>: Can you condense the text into a few key points?

I know this can be a sensitive topic, but I'd love any advice from men AND women. 

Whener my gf of 4 months has that time of the month "her P" she becomes extremely emotional, agitated, and I feel like anything I do or say is walking on eggshells. I've dated multiple women, lots of em, and none are even remotely close to this. 

Tiny comments make her extremely upset to where she'll almost ingore me for 2 days at a time, I'm never right.. And nothing is good enough. This out-landish situation ONLY happens during this time.. 

The rest of the relationship is excellent, but her lvl of emotion and control while on P is worse than any woman I've ever, ever dated.. She never says sorry, and I'm the asshole until the week of hell ends. 

Do I just be cautious and stay away? I don't want to avoid her, cuz then I'm being a dick, rude, only want sex. Etc. I can't win, or even be 50/50. 

It's starting to get old, not sure how to handle this unfair situation.
<bot>: new GF periods change her mental state, attitude, and general being WAY more than any previous relationship. How do I proceed?