Working During Pregnancy...

Hi ladies! I am currently 10w3d pregnant and work at a supermarket. I work on the registers, stacking shelves, in the bakery, in the deli, stacking fruit and vegetables and cleaning. I am on my feet all day and my feet get sore, but other than that I have no other complaints. I'm a huge worry wort and I stress about everything! and since this is my first pregnancy I'm really not sure what to expect. My question is, do you think there is anything that I shouldn't be doing while working at a supermarket? eg. heavy lifting ect? I just worry that everything I do will harm the baby! I know it's ridiculous but I just worry.