Should I be worried about him not replying back to Christmas text?

I’ve been dating a guy for a little over a month. Anyways, he’s been consistent and reliable with plans etc. Although, it seems something has changed a bit as he seems overwhelmed with something causing him to not be as attentive as he was earlier. Last week I mentioned this. He called me and apologized and said he’s been dealing with a lot of crap and hasn’t been feeling 100% and that he would call me sometime next week and wished me well on my trip home for the holidays. He did mention that he wasn’t looking forward to the next couple of weeks (holidays). I wished him “Merry Christmas” but he didn’t reply back. A day later I sent a text saying everything alright? It’s been a few hours since…no reply. Should I be worried?

Should I be worried about him not replying back to Christmas text?
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