Pregnant or Not Pregnant.......To get pregnant or to wait......Those are the questions!

             For the last few days I have been either waking up in the night feeling nauseous, or feeling nauseous in the morning for a bit.  I never been one to eat breakfast nor am I hungry for breakfast, but lately, I have been hungry when I wake up, and I will eat something then be hungry again within about 2 hours.  I am on birth control, but I know that is not always 100%.  Now here's the thing...
            If I am pregnant, I would have gotten pregnant in Feb, which means the baby would be born in Nov. and I am not totally against that.  That is more around the time I would have liked for our next baby to be born. 
           As I said yesterday we have been discussing another baby, and if we were to get pregnant when we were discussing, the baby would be born in the same month as our daughter.  I'm not sure that is fair to her.  I have also been thinking that I am not sure I am ready for another baby just yet. Now don't get me wrong;  I LOVED being pregnant, and I absolutely LOVE Haleigh, but I want to be fair to her, and I am torn whether she needs a sibling close to her age or if I should spend my time raising her and sort of spoiling her right now.  Then when she is older we can have another, but then they won't be very close to each other.  I know that if we have a boy, they may be close when they are young, but then when they get older they will be very different, and I don't really know how that works b/c I don't have a brother.  I am the oldest of four girls all very close in age. 
          Ok, enough of that for now. I am trying to get healthy, and nothing seems to be helping.  I have only lost 20lbs since Haleigh was born and she is about to be 1!  I am short and I am not happy with my body.  I agree with my very good friend that the number is not what matters.  If I were tall, my number would be ok for me; as my sister's number is a bit higher and she looks great, but she is 4-5inches taller than I am. 
          I was just hoping that someone had something for me to try different.  I do not gain weight, really, however, I can't lose it!  I generally stay at the same weight until something happens and I gain a little, and then I just hold on to it again.  I didn 't gain that much when I was prenant, but seeing as how I am short, and I was already a little big for my age and size, it doesn't look so good on me.  I guess I just need a little encouragement, and advice.  I tend to try one thing and if it doesn't start working within a couple weeks, I give up.  I know there is really no quick fix, but I suppose that is what I feel like I need.
         I am just rambling now, so if anyone has any advice or even just comments, feel free, and I'll be back another day.