Are the posts in the ‘TTC’ and pregnancy groups representative?

I’m ttc and I’ve been reading a lot of posts in the TTC groups, and I’m really scared because chemical pregnancies and miscarriages seem like the norm. Is it useful to read these posts or am I just freaking myself out for no reason? I got my first positive test over the weekend and every time I use the bathroom I’m so scared that I’m going to see blood.