is it normal to feel normal? like prepreggy self? during the first trimester?

Hello Mummies! Found out I was pregnant and went for a vaginal scan. bb was 5 weeks 5 days. I was feeling rather like my usual body self until my supposed period was 1 week late and the nausea, cramps and all came during the missed period week and lasted for like about 1.5 weeks. now Im at week 6 and im feeling like prepreggy situation. is this normal? a little worried that something might have happened. :( however there isnt any weird discharges, just occasional itchiness and smells.