Am I overthinking or is my husband being suspicious?

My husband work out of town Monday-Friday and comes home early Saturday morning. This morning we were on the phone talking and the hotel receptionist walked by the car and they started talking. They talked for like 10 minutes and I could here the entire conversation clearly up until the point she asks if he’s going back to his room he responded “yeah I have to go pack…” then the phone went completely silent for about two minutes. Then he casually unmutes me and says sorry I accidentally muted you. I’m usually not the jealous type and I usually trust him 100%. But I don't know if it’s hormones (I’m 8 weeks postpartum) or if I’m just seeing stuff that’s not there
Am I overthinking or is my husband being suspicious?
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