Did you find you were really really tired ( or is it just me??). Yes, I was incredibly tired, always blamed in more on the pregnancy than on the b/feeding though.
Did the pregnancy affect your milk supply? I don't know if the milk supply was affected - dd1 didn't seem to have any complaints anyway. She was 17 months when I got pregnant, so even if the milk supply went down maybe it didn't bother her too much, just ate more?
How did you cope with Bf when hugely pregnant? It was fine, dd1 was always very acrobatic while feeding anyway, , often she would feed while sitting next to me on the sofa, or even standing in front of the sofa.
Did you stop feeding older child for the first week after birth of new baby?
Noooooo! Why should I? I went into hospital to be induced in the morning and stayed there for about 30 hours. I'm not exactly sure when dd1 first fed after I had dd2, but it was no more than 24 hours after the birth. I had one on each breast Did you have a problem of over supply?
Not at all! On the contrary, the older child still feeding makes things easier in a way - the milk coming in wasn't half as painful as first time round. Also dd2 never lost weight like most babies do after the birth. The midwife said this was because dd1 helped with bringing the milk in and the supply was good from the start.
And what I really want to know is....how does the body supply the correct ( amount, type) milk to an 18 month old toddler and a new baby at the same time???? As I understand it the milk production is guided by the younger child, so your body will produce colostrum after the birth - the older child just makes do with that, my dd1 did anyway! The milk came in quicker for me than with dd1, though. But it's not a problem to support both children!
I know that a worry is often if the older child will be particularly jealous to have to "share" the breast with the new baby. But I believe, and have heard from others, that the opposite is often true: Tandem feeding can ease jealousy, especially if you "endure" having both children feeding at the same time sometimes - for me it was enduring it, because I would rather have had only dd2 at the breast sometimes, but I think dd1 felt greatly soothed by the fact that both she and dd2 were both "allowed", and when dd2 was six weeks old she lost interest in feeding and sort of "handed the breasts over", never looking back! And dd1 has only ever been loving and wonderful with dd2, no jealousy whatsoever.
Hope that helps, but feel free to ask me more questions!