symptoms to no symptoms

Im 8 weeks pregnant & normally everyday I have extremely bad nausea to the point where im gagging from every food smell & throwing up every other day. Today? i barely feel any nausea, it feel so odd not having it that it makes me uncomfortable bc i feel worried. Is this normal? I’ve literally been soo scared of a missed miscarriage bc i hear a lot of stories about it & i had some light bleeding early on during my pregnancy but had ultrasounds afterwards to confirm my baby had a heartbeat.