How much should I be pumping when I don’t nurse

Anne • 🤰🏼Expecting #3 in late august! Mommy with an autoimmune disease to my toddler girl Ivy 🧸💕 and Baby Jackie born feb 23’. Wife to an amazing husband. In grad school 👩‍🎓

I feel like I’m not producing enough! When I don’t nurse her I am only pumping about 1 oz on each side maybe a little more she’s 3 weeks. I hope she’s getting enough :/ kinda worried