He has gone about the entire weekend of almost zero contact

I am an anxious person in general and am TRYING my hardest not to jump to the negative BUUUT my bf (been exclusive now for 2 weeks) has gone about this entire weekend without reaching out. I get we all need space, but to ignore this whole time ain’t it. I have been the one the past 3 days to reach out. We chatted on the phone Friday evening, and as we were hanging up he told me “I’ll talk to you later.” Well all Saturday goes by and I hear nothing from him and so I reach out close to 8 at night asking if he’s alive and this was his response as seen below. I still haven’t heard from him since early this morning and it’s making me feel icky and thinking I did something bad, he suddenly lost interest, or there’s another girl….etc. Idk what’s happening but things were fine when we chatted via phone and hanging out Thursday. I’m leaving him be and will let him come to me, but I’m about there to dump him, as this isn’t the first time he’s done this with 24 hr. no contact. I’ve expressed how it makes me feel and he got defensive by saying “you know I have meetings at work” and I told him it has nothing to do during the week it’s when I don’t hear back for 6+ hours at times makes me question where I stand and why he bothered asking me to be his girl if this is his behavior. I don’t want to come off like a nag but this isn’t something I can put up with long term. How do I approach this?? Cuz I really don’t want this to end, but also feeling confused.