My gas and bloating flared up at first, and then went away after the first trimester was over. I'm only recently experiencing some issues again, and I'm going to restart my fiber supplement. I ate a lot of tums during the first trimester as well, because of heartburn. That also went away and then came back at the very end with avengence!
I had my daughter Sept. 18, and let me tell you, I was one bloated whale towards the end. When I look at my 40 week picture, WOW!!! I mean, I was bloated from head to toe, so if you retain water easily (as I do) get ready for that! but it went away within days after her birth, phew! And I enjoyed not having to buy a super big coat for winter, and wearing flip flops for 5 months, so being pregnant in the summer does have its benefits.
Anyway, congratulations!! Enjoy pregnancy, I sure did. I hope it's easy for you.