R.,
I can understand but, I would recommend just enjoying your little boy for a few months without the breastfeeding or preganacy just to give yourself a little break. I have 7 kids and by the younger ones were about 8month old when I became pregnant with the following sibling. I did just fine and I am sure you would too, but, I think it is nice to have a little time just learn more about the older one before the next one comes along.
I know you will be fine no matter what but, just a thought.
Right now, I am personnally having a hard time since I know that Lucky 7 is all we will had. My husband volunteered to get"snipped" even though I really didn't want him to. That is a different story. Anyway.
Blessings to you all and whatever happens will be fine.
Best of luck with everything!!