Fast paste work

Hi, just need a bit of reassurance. I'm working in retail and my store is very busy. Required lot's of standing and bending. I'm really worried that might harm baby. I'm 19+2 and I don't feel any kicking yet. I'm back to work for a week now. Before that I felt a bit of baubles now I don't. I'm not sure if I'm too busy and don't pay attention or something else. I'm having my scan in a week time. Is anyone else in similar situation? How you finding back to work ?