Do these sound like red flags my husband is cheating?

We have been together for 12 years and have always had a great sex life still averaging at least once a week, usually more. Up until recently at least. He has recently stopped going down on me when he used to frequently (everything is still nice and neat and clean as ever!) We had the worst dry spell of our marriage going 2 weeks right before he went on a work trip where some time was lost and alarm bells started going off. I texted him goodnight at 10:30 and when he didn’t respond an hour later I said it hurts you went to sleep without saying goodnight. Nothing until 6:30am he said his phone died and was in the lobby with coworkers til 2am and didn’t want to wake me by responding in the middle of the night. This was 2 weeks ago and his demeanor has been good, he has been sweet and helpful but something just feels off. I’ve been cheated on before in past relationships so I’m struggling with if this is paranoia from that or my intuition. Do these seem like red flags for cheating or should I not rock the boat in what is other wise a great marriage and life?

Do these sound like red flags my husband is cheating?
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