Fear of something wrong

Hey guys! I'm 15 weeks 4 days pregnant. I feel no symptoms and I have fear that something is wrong 😓 I have a little bump but I don't feel like pregnant. Has this happened with any of you and everything was normal? This is my first time and this baby means so much to me . 😢 I did my last scan at 13 weeks and everything was normal. I heard my babies heart beat. But since I feel no symptoms I constantly worries about it. My next appointment will be around 28th of this month. But I have this fear of what if is something wrong. What can i do to avoid this. I'm stressing myself lately.