Short Tempered Boyfriend

Does anyone's boyfriend just randomly get angry or aggressive? Mine does, for example I thought I was pregnant so I bought a pregnancy test.. then later went to his house. We brought the the bag inside of his room and his dad walked in to talk to us when he saw the pregnancy test box.. he didn't say a word besides saying he didn't see anything.. of course I was so embarrassed. After his dad left my boyfriend began to yell at me that it is my fault for not hiding it, and his whole family is going to yell at him for it.. I then told him I'm sorry but it shouldn't be a problem that accidents happen. He just doesn't understand and always seems to be irritated with me 🙁