When Should first ultrasound be? Should I have one or blood work before I tell my in-laws on Thanksgiving?

We want to tell my in-laws that we’re pregnant on Thanksgiving but I will be seven weeks then. I’m five weeks six days now and haven’t had an ultrasound or bloodwork yet should I get either before? I had a miscarriage before so I’m cautious telling everyone. Or should I just wait until Christmas to tell them when I will be further along and hopefully had an ultrasound by then.

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