Breastfeeding and pregnancy

So I found out I'm pregnant about a week ago, which would make me 7 weeks pregnant. I've been breastfeeding my 8 month old. I pump about 3 times while at work, and went from around 15oz a day to 5 oz a day...I had noticed the difference but didn't paid much attention to it. Now all of a sudden I'm pumping about 9-10oz a day again. I dont have my dr appointment till next week. I'm kinda scared now. Could something happened to the baby and that's why I'm making more milk ?