Is this a red flag? Man heavily confiding in me after just one date?

I went to have drinks with a guy and enjoyed the date. He immediately set up a second date and has texted me every day all day since. He also texted me that he’s been crying about his dog either being put down or having a potentially fatal surgery confiding in me. It feels a bit weird though, like very heavy for someone you barely know? Am I overthinking this? Or is it potentially a red flag?
Is this a red flag? Man heavily confiding in me after just one date?
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