Feeling very nervous

I had my 8 week ultrasound and everything looked awesome. Baby was growing and had a bpm of 174. I will be 12 weeks on New Years and don’t feel many symptoms. I honestly haven’t had very many since the beginning. Little to no nausea except for maybe a couple times. Tiredness and mildly sore breasts. I just can’t help but worry about finding the heartbeat and my next appointment isn’t until the 9th, and I’ll be 13 weeks by then. I know I shouldn’t read into all the scary posts but they just get to me. I keep seeing things about missed miscarriage and it freaks me out. I have had no spotting or bleeding my entire pregnancy. I’m also entering 2nd trimester where I know a lot of women can feel awesome like I do. Can someone please help reassure me? First time worried mama here. :(