So confused

So me an my SO will poke each other in the butt playfully well I did that today because he said I crawled through his fart an he ended up slapping me not hard didn't even leave a mark I'm not leaving him I don't have a job an have no where to go but would you leave someone over this I'm currently pregnant with our second kid what do I do he told me he didn't hit me that hard an that I was being a baby what do I do besides leave him