Nursing during pregnancy. Milk supply question.

I am about 6 week pregnant and still nursing my 16 month old dd. since before I found out I was pregnant, I noticed a drop in my supply. But today it doesn't seem so low. Is that normal? For my supply to go up and down? I don't want to lose my supply, but I don't want to lose this baby either! I was worried that if my supply is going back to normal, something was wrong with the baby?

I'm almost 10 weeks and still breastfeeding my son. I think it varies naturally just like when not pregnant.

Still nursing my 15 month old and I'm 9 weeks. I think my supply is getting low because she will stop and push on my boob before switching to the other one. But it doesn't seem to be stopping her, she's a booby addict so she will probably be in it for the long haul.