Missed miscarriage

Found out last week I’m having a missed miscarriage my body still hasn’t clued I. And my follow up isn’t until Thursday. It’s the long weekend and I’ve been avoiding people

For the past 9 weeks since I’ve been thinking I’m pregnant and they would kno the minute I wasn’t drinking. My in-laws are having everyone on the boat tomorrow (they know) and I really want to go but I’m terrified I’m going to start having the miscarriage on the boat. So my question is if it did come naturally was there a warning like cramping the day before or start spotting? I really need to get out the house and stop thinking. They believe my baby stopped growing 5 or 6 week and I’m 9 weeks. Thanks for the help