upset 😡😭

So my SO is ALWAYS horny. I'm not, after having our son I lost all sex drive (my uterus is also tipped backwards making sex uncomfortable)
Well this morning he begged and begged and begged to get some I kept telling him no, and to stop messing with me. He didn't. He ended up getting some. Now I'm upset because I never consented to it. All I kept saying was stop and he wouldn't. I know most ladies would say why didn't you get up and run, it's a little hard when I'm 98lbs going against 172lbs laying on top of me. 
Ladies I'm not sure what to do or think. My entire view on sex has just completely gone away. I want nothing to do with it.