I was adament that I was never going to have another baby after my first but then suddenly I was adament I did want one and now have the two. A couple of people who I know but dont see very often, see me pushing the parm and refused to believe she was mine because they knew how strong I was against having another! lol
What you need to think about is what is important to you now and in the future. You want a lot at the moment, career and new baby and it is possible to have it all but just take your time and have lots of patience. Decide what to concerntrate on first, personally I would go through the midwife training first. It may be easier to do it that way than have a baby first then do the training with two kids to look after.
During this time, mr tigwig may change his mind regarding having more children. Dont give up hope just yet, on anything :)