currently fighting

So my man is upset with me over something small, he's actually being dramatic because he's never had a problem with anything of this nature before. It's something that can easily be resolved with a conversation but we just haven't had the time to actually have it (we've both had a super busy work week and we don't live together so we haven't seen eachother this week) anyway, his birthday is in 2 days, should I give him space to get over it or should continue trying to talk to him? He said he doesn't want to talk about it yet because he wants to have a proper conversation and doesn't have the time for it at the moment but I don't want him to be in a bad mood considering his birthday is in 48 hours.