Unfortunately, it is hard for natural deodorant to last long and hold the smell & sweat as it does not contain aluminium. I tried using mama choice and sukin natural deodorant. Both doesn’t last. I have seen people recommending the crystal mineral salt deodorant. I have not try before but it may work for you. Furthermore, during pregnancy, sweat glands are more hyperactive and due to our hormones change, it will cause an odour on the body.