M.S.
T.,
I was one month pregnant with my third baby and still nursing my 8 month old. Be careful and consult you doctor. My uterus would contract (lightly cramp) every time I nursed, raising the risk of miscarrying. It was then that my doctor told me I needed to quickly stop nursing. Thank God I did not have any high risk pregnancies or miscarriages.
So just check in with your doctor before you decide. Everyone is different.
M.