Need advice

So I am on Seasonale which means I only get my period once every 3 months. Sometime I still experience the pms symptoms which can often include anxiety. This would be right around the time of my pms week, I'm so stressed at work, and I'm in an upcoming wedding that has been so stressful so far. Like I don't even want to go and I'm a bridesmaid. Obviously this has reigned havoc on my life. I'm on antidepressants and did get adavan from my Dr to help get through the upcoming shit. I know I'll feel better when it's all over but it's currently hurting my relationship with my fiance. She is the most important person in the world to me and I don't know how to make this easier. I know that in some ways I'm pushing her away but I don't mean to. I am actively working on being aware of my behaviour so I'm not taking life out on her but I would like advice on things I could do to maybe improve things while we ride this out.