Did he mean to hurt/harm our [possible] baby?

I am 28 and my SO of 10 months is 36. We have been officially TTC #1 for 3 months. Well I am 8po (BFN) but I know it's early to test. He saw the test and ask if I was pg, and I told him no. (I wanted it to be a surprise when we have our 1st baby.) So later this morning he was laying in bed and I was standing in front of him and he punched me in my LOWER abdomen. Not hard but enough to make me flinch. In reflex, I punched his fist away and yell at him to not hit me[in my uterus, specifically]. And he punched me again, but lighter even then before, and I hit him super hard on his back and walked off.