Is it normal for boyfriends to constantly swear at you?

I just need some advice. My boyfriend and I have been dating two and a half years and we used to never swear at eachother. We'd swear but never at eachother and we'd never say I hate you. We went through a 2 month phase recently where we fought non stop for hours at a time usually ending with me crying. I became more emotional and he became angrier which made fights even more common. During this time he started to hardcore curse at me. Telling me to shut the f*** up and calling me a *****. I think I hear him tell me to shut the f up at least once a day and it's usually over me just telling him something he doesn't wanna hear. Nothing mean just like saying his conversation with his brother was confusing and he'd get all pissed and swear at me. I've only sworn at him once. I know to some it may seem stupid but I grew up in a family that never swore infront of eachother. I don't mind it but when it's said to someone you're to love I feel like it's a slap in the face and disrespectful.