How far along are you? When I was 7 months pregnant, (just after the Christmas rush) I noticed tenderness in my pelvic area as well, and found it hard to walk because it hurt...I went home from work the day after Christmas, and called my doctor, and when he checked me he found that my cervix was thinning ( it wasnt supposed to be doing that yet) and my daughter had flipped around, and he could feel her head.He took me out of work that day. This all happened within a few days. As for the gassy part, I was gassy during my whole pregnancy...lol, but I would definately mention this to your doctor , as it could be a sign that you need to rest more, if you arent already. I called my doctor for EVERYTHING!! He was great, and I was glad I was in tune with myself and my baby, because she was born a month early, because there was an abruption in the placenta and other complications BEFORE she was born. (everything ws FINE after)I dont mean to scare you, just saying that you shouldnt be afraid to call your doctor with ANY questions. Even if its something you think could be "stupid". Because its all WORTH it, Ive learned that!!
Good Luck, keep us posted.