I had a lot of gas with both of my first two children...I would get sharp pains with mine...and gas in my chest. I would talk with your Dr. about something for the gas if you get bad pains...I ended up taking gasx and prilosec for mine. It helped! Good luck!
No....not mistaken for contractions, but definitely have had the worse gas pains of my life while being pregnant, now I know how babies feel with excess gas :( no wonder they cry.