Defining rape

I suppose if I have any questions about it, then that should answer my question. I think I need some validation.

A number of years ago, I had trouble breaking off a relationship with an ex. We were "broken up" but still sleeping over at each others' places and arguing a lot. I had specifically told him that I would not sleep with him if he wwas seeing anyone else. I eventually discovered he was lying to me, and of course, was sleeping with another woman. I was angry. I was done.

He came over to my place in the middle of the night and insisted we talk. (We had a baby already.). So I let him in to talk...intending to hash out scheduling and other practicalities. Well after arguing about the other woman, I told him he had to leave my place. He refused. I kept insisting. He refused. I recall my back being against the wall, him up in my face, physically blocking me from moving. He flat out refused to leave.

Here is where the details get hazy. I have been told by my therapist that I disassociated from the trauma of the physical threat. At some point I gave up (I had to work the next day) because I was afraid of further escalation, and stopped insisting he leave. Basically he kept pushing until he got what he wanted. He then insisted on sex. I didn't explicitly say or do anything to either agree or protest.

Is this rape?