2nd trimester 13 weeks

Its here, I am now officially into my second trimester. I managed to run up the stairs yesterday without feeling like I would pass out and I can stand again for periods of time without feeling the need to sit down all the time. I think I will now be able to begin some light exercise again to rebuild my strength. Before I was pregnant David and I were working out on our total gym each afternoon. It was great to do it together. I strongly remember one day feeling just so tired and I could not push my body any further, I later found out that I was pregnant and that was why. I had hoped to keep up the exercise but my body just wouldn't let me. It was hard just to get the washing out. I have never felt quite so fatigued with any other pregnancy as this one, maybe it's twins. ( I jest).
I have been dreaming about twins though and they do say that the older you are (32) and the more children you have had (no.5) the higher the chances. I love the idea of twins and would be really excited but ask me later on in pregnancy if it became a reality and ask me after they were born and I might answer differently. I also like the idea of 6 kids but for the first time in my life I can say that I really don't want to go though the first 3 months again so twins would solve that issue for me and make the extra vomiting and tiredness really worth it.
I don't think my belly looks like twins are on the way and they would need to be identical as there is no history in my family of twins. I don't even know why I am talking so much about it as it would be such a slim chance. Wishful thinking maybe!!!