2nd baby, 1st trimester: what is happening to my body???

I am the proud mama of a 2.5year old and am 11 weeks pregnant with #2. But there is seriously something going on - I'm so bloated I look like I did at 5 months with my first, I'm so gassy and just plain exhausted. My first pregnancy was pretty easy except at the end where all the extra weight my frame wasnt used to was causing me to have pregnancy related carpal tunnel, heart burn and major swelling. Any other mamas experiencing significant differences in their pregnancies and/or feeling so bloated you already look like your much farther along than you are?? Does the bloat go away or am I stuck on this path to grow as big as a house and roll away for the next 6 months?