Still nursing my 17 month old

Amanda

I’m currently 19 weeks pregnant and recently noticed my nipples are extremely sore when nursing. My breast don’t seem full at all and even when trying to hand express milk I get nothing. My LO still wants to nurse but I don’t know if he is actually getting anything or just using me as a comfort. He eats plenty of regular food during the day and drinks whole milk . Should I stop nursing or keep trying??