Breastfeeding concerns

Soontobeamyd

I am expecting my second child in July (my first will be 13 years old in January).  I strictly bottle fed my son and never gave breastfeeding a second thought.  Now that I am expecting again, I want to do it.  I am concerned about a few things and hope someone with some knowledge on the subject can help me out:

1 - Does breast size play a role in ability to do it effectively?  I have very large breasts (DDD) as I am overweight and I am worried about being able to position the baby in order to latch on without worrying I will restrict the airways.

2 - If you never breast fed with a previous child, can you do so with subsequent children?  I am worried my body will dry my milk thinking I am not going to use it again.  I already have some very minimal milk appearing now.

3 - Can breastfed babies be easily weaned when formula needs to be introduced?  I plan to breastfeed until 6 months or at the first sign of teeth.

I am hoping to get some relief from these worries.  Thanks!