high activity job and pregnant

okay so i just started a job at amazons warehouse, packing boxes and putting them onto the conveyor belt. My bf also works here which is what prompted me to apply since it would just be easier schedule wise. anyways sometimes stuff can be pretty heavy plus a lot of standing and bending as well as the fact that it’s night shift which i feel adds stress from lack of sleep. i just found out i’m pregnant and am wondering if this is gonna be a problem ? i didn’t really wanna work here but after job searching for a month i was pretty desperate. also i had a miscarriage back in february which i 100% believe to be from the stress of my job back then. i was working at a jewelry store and a little after i found out i was pregnant the whole store got covid and i was forced to work open to close by myself every day for 2 weeks which involved taking out and putting back heavy trays of jewelry plus just the stress of working by myself, come to find out when i misscarried that the whole time i was working i had covid (after multiple negative at home tests) so i’m honestly just really scared of the same thing happening again.