Gallstones , cramps and pregnancy?

I'm 17 weeks pregnant with my second baby. Six months after I had my son (4 years ago) I had my gallbladder removed bc I had gallstones. Even after the removal I still got those gallbladder attacks at night that would last 30 mins or more. I been getting them more now .. should I worry ? I also seem to be getting cramps during the day when I go upstairs ... where I work alone and have to be going up and down the stairs all thru out my seven hour shift. .. could that be the cause to my cramping ?