Help!! PMS questions!!!

Ni
Okay so I've been on the pill since 2012 and I switched about last year to a new one and this exact time on my cycle (cycle day 21) I start my PMS symptoms. I'm such a bitch and irritable and my boyfriend gets so frustrated with me and I try explaining it and he just gets even more mad and tells me to stop being a bitch and relax. 
Does anyone ANYONE have any secrets on how to deal with PMS? We always fight during this week of every month and it's just really taking a toll on both of us. Any advice or remedies would be SO helpful. I'm desperate!