15 weeks no pregnancy symptoms

So I’m 15 weeks pregnant so far I have not experienced any pregnancy symptom. If feels wonderful so far all appointments baby looks healthy but when the waiting for next appointment comes up I feel worried every day not feeling morning Sickness, headache, lightheaded, no nauseas, no skin breakout etc. It makes me think maybe the baby is not growing ok, maybe there is something wrong, like it feels to good to be true. I feel sometimes anxious not feeling “pregnant”.

I know it might be hard to understand but is anyone out there that could help me to feel relaxed somehow?