my ldr bf is acting distant after an argument

so last night we had a fight where I did end up saying some hurtful stuff and even tho I thought we sorted everything out hes been acting cold and distant all day. This is really confusing since I'm meant to be seeing him in 2 weeks so i dont know why hes acting like this. Like today he hardly spoke to me but even when we did speak he just seemed uninterested and cold towards me and this is making me really sad. I dont know what to do like shall i apologize and ask him whats on his mind? Hes never been this cold and distant towards me for this long and all i want is for things to go back to how they were