The unpredictability in pregnancy has me going nuts. There's so much that is out of my control that…

The unpredictability in pregnancy has me going nuts. There's so much that is out of my control that can just go wrong.. I have started feeling movements every night but the last night or two there hasn't been much; I was told not to worry because it's early and some day baby may not be as active but I'm still worrying obsessively. Next appointment is on Monday with another ultrasound. I can't stop imagining something coming up wrong and it's making me a little loopy. I'm trying not to stress and I'm holding it pretty well and trying to distract myself but there's currently nothing going on and I'm left with my thoughts.. what can I do to calm down?