Paranoid idk

Jen • Pregnant with baby#1 and im so blessed
So I'm 8 weeks 4 days today and I'm paranoid about just about everything. I feel like my stomach isn't getting bigger but my fiance says its because I'm small but he sees the difference he tells me to remain positive but I'm always so nervous that the baby would stop growing or the heartbeat would stop or that too much cheese would kill my baby or eating the wrong things or doing the wrong things I'm just so paranoid any advice on what I could do to be more relaxed I haven't went to the doctors yet but I went to the ER when I was 6 weeks I believe and there was a heartbeat at 116.. I'm doing my best to just relax and stay calm but it's kind of hard because some of the things I read on here literally scare the s*** out of me and I feel terrible for the women that goes through some of the things I say. But is there any signs I would have if things were going left meaning wrong? This is my first time being pregnant so I just wanted to know