Pulled muscle?

Yesterday I was at a friends house and their dog was chasing a chicken and gonna kill it. Well it ran past me so I quickly dropped to a knee and snagged the dog and picked it up. She probably weighs 50-60 pounds. It was a knee jerk reaction and almost instantly I realized I hurt myself. Now it’s 1am and I am awake in pain. Baby is moving and I don’t think I hurt him, but I can’t hardly walk, it hurts to be laying down, and to separate my legs is really painful. My assumption is a pulled/strained muscle and I don’t think there is anything that can be done for it :( I got 4 more hours to decide if I can make it to work tomorrow/today. I teach.... I’m leaning towards it ain’t gonna happen. Has anyone done this to themselves yet? What helped?