If I may, I'll share my experience of contacting Women's Aid.
My ex was moody, but he never hit me.I always though that our fights were mutual, I was constantly being told I was the one who caused it, I was the problem. etc etc.
Someone made the appointment with Women's aid for me. I was mad at her because, like you, I'd never been punched or kicked. A push here or there against a wall is hardly worth reporting him for eh? I was mad because I was using up an appointment that other women who were punchbags for their partner could have used. I was a time waster.
So I get to the appointment and a lovely lady and I had a chat. That's all. She listened and cared and occasionally made a point or two. At the time I was adamant that it wasn't that bad, we were in love and had a trip booked and paid for. Lovely lady told me that I was welcome to drop in any time for a chat. I was sure that I would never need to meet her again but she gave me a lot of food for thought.
So that's all you do. You chat. If you want to stay, they will support you and suggest ways that you can protect yourself. If you want to leave, they'll help you work out what you need to do to do it safely. And they don't judge you either way, they just chat and more importantly 'get' what you are going through. They get why X or Y bothers you when you can't put it into words.
So this week, don't think about anything other than ringing to have a chat with someone who gets it. Nothing else needs to happen after that. You are in charge. You are so used to not being in charge in every area of your life you are assuming that once you speak to WA the train leaves the station without you being ready. That won't happen. They follow YOUR lead, and their advice is guided by you - if you want it.