Low supply / breast pump

Hi mummies. I want to buy a breast pump. My 1st pregnancy my supply was low to no supply. I tried everything therefore i had to offer formula. Im thinking of trying to give breastmilk, if i have to my 2nd child. Can i know, does it means first pregnancy no supply means 2nd pregnancy will have no supply too? If not true, can recommend me a pump that is worth to buy? Or something more affordable and good for low supply mum?