What do you do when you feel you’re experiencing a MMC?

I’m only 4 weeks 6 days but I feel I’m experiencing a MMC. All my symptoms stopped a few days ago, but I’m having no cramping or bleeding. I feel a disconnect with this pregnancy and refuse to tell my family and get them excited just to go to my first ultrasound and not see a heartbeat. My instinct tells me it’s over. I’ve prepared myself for that outcome. But my appointment isn’t for another month. How am I supposed to feel like this for 4.5 more weeks and act like it’s going to be fine? My SIL is an OB nurse and she said my lack of symptoms are normal and I shouldn’t worry but I’m convinced I’m no longer pregnant. It’s too early to even find a heartbeat but I feel there isn’t one so I have to wait at least another 2 weeks to see if I’m right. This is excruciating.