You made the right decision. Think of it this way. If you hadn't gone with your instincts and just went ahead with the vasectamy you'd never know what it would have been like to have the three you felt you wanted. You'd have been kicking yourself the rest of your life. Never sure.
And, there are those out there struggling to even have one. You have been blessed three times! IT wasn't just your decision, it was your mates and God above! It must be right.
And, you know you'll love this one just as you do the other two. It's just your anxieties and worries that are confusing you. Sit back, relax, and enjoy the pregnancy. You knew you needed one more so it doesn't matter what others think. And you can do whatever you want if you set your mind to it.
The sideways glances are from those who know what a challenge it is to raise children, and they are probably thinking that it would be too much for them, but it won't be for you. Your gutt told you something was missing. Now it won't be. Be happy! :D I am happy for you.
I always said I'd only have one. So I could concentrate on trying to raise this one the best I could. Provide as best I could. And have no conflicts of interest. I didn't think I could share my love with so many at once. Multi tasking. My hubby convinced me two was better for playmate reasons. After that it was all I wanted. Two, just two, and close together as we could so I could get through the rough stages quickly (potty training etc..) and they could be close in age for playing. We were blessed with two great kids! A boy, then a girl 14 months later! I have been happy ever since. I have to admit, sometimes two feels like something is missing, too easy, but there are times when I am so glad we stopped. I get too easily stressed. But that's me.
My sister said she needed three also. She had that same sense of, "two just isn't enough. Something is missing". She never regretted that decision. She once told me, "After two it feels the same. Once you past that "more than one" stage what's one more?" It worked for her. ;)
The career idea may change up a bit, but that's ok too. Don't be so rigid with your plans and yourself. Go with the flow. So you need to rearrange a bit, no biggie. Flexibility is something you'll have to deal with the rest of your life with your children... they are unpredictable at times, and you'll need to replan your days at times. Sometimes I get really tired of being so flexible, but that's life for you. It spices up your life. Don't let a change in plans make you feel like you failed to reach a goal. You are just living life, and can't predict all the moves. Life is a journey not a destination.
Enjoy being pregnant knowing this is the last time you'll feel that growing entity inside you. I tried to enjoy the second pregnancy as much as I could because I knew it would be my last. It was tricky. It had been a long time since my body was my own. Being pregnant and breast feeding for two and a half years straight I was wanting my body back! I was glad that I had them close in age. There were so many benefits I hadn't thought of. Getting them through the stages even faster. She wanted to copy everything her older brother did. He potty trained and she did too, he got off the bottle and had a sipper cup, she wanted a sipper cup too. It was great! I was the youngest of four girls so taking care of someone wasn't something I was used to. I was always taken care of, a baby. So to have my own was very stressful for me. Having a third one was not anything I'd want. But like I said, that's me, not you, so don't worry about how others feel.
My oldest sister, probably because she had THREE younger sisters, wanted three kids of her own. It filled some sort of void for her I think. Who knows?
I wish you the best of luck and happiness. Try to stop worrying, it gets you no where. Be happy with your decision and enjoy that miracle inside you! Try to look forward to picking a name, buying little outfits, fixing up the home for the new arrival, and the look on the other kids faces when they see the newest addition to the family has to be priceless!
I wish you well!