depression in 1st trimester

maybe this wasnt the best time to get pregnant but i know im going to try to be the best mom. unfortunately i haven't had any stress free days or a relaxed non chaotic environment. i know nothing about being a mom and i dont have much support im doing this on ny own. how do i get through depression while trying not to stress so much that i have a miscarriage. every time i get to upset i get an uncomfortable pain in my stomach. im worried ive been stressing so much.