Week 6 no symptoms

Hey mommies, i am currently at my week 6 and I have zero symptoms beside slightly sore boobs. The only time i felt nausea and vomited was during week 4 (first 2 days) after which everything became back to normal. I am quite worried if the HCG hormones is going down or something. Has any mommies experience something like this? Sorry first time mom here and i really dunno what to expect. My stomach dont feel a thing except very slight cramp or twinge here and there but not all the time. It still looks so flat? I dont even feel pregnant. #firsttimemom