First timer

Hi ladies! I just found out a few days ago that I'm pregnant with my first baby. I think I may be about 5 weeks. Just had the progesterone blood test done yesterday so I'm eagerly waiting for the results to confirm. In the meantime, I was wondering what advice you all may have for me. Any diet tips? Exercise? When does one start to show? Any pearls of wisdom would be greatly appreciated! 😊