I make a point to try to let it out and it usually feels better immediately afterwards. I just take 10/15 minutes to myself, go down in our basement and sit in "childs pose" and just natually let it out. Might be TMI, but it works for me, and this way, I don't have to take anything for it either.
Re: Gas problems?
BFP #1: 10/15/10- DS born 6/29/11
BFP #2: 6/26/2012- DS born 3/11/13
BFP #3: 2/26/14- MMC and D&C 4/11/14
BFP#4: 9/1/14- MC 9/6/14
BFP#5: 10/3/14- Due Date 6/15/15