Constipation

Sooo we all know the joys of being crazy constipated during pregnancy. I'm 28 weeks and have just decided to deal with it. But these past few days boy let me tell you I'm through! I'm tired of having little, hard rabbit turds. I know I can take something for it but my question is....am I going to get dihaerrea from it or will it just make it easier to poop? I'm a server, and just want to know if I'm going to get a bad case of the BGs if I take come colace or maloxx while I'm at work or something cuz that would NOT be ideal lol.