I'm feeling sick after taking laxatives for the first time, is this common? i have abdominal pain, bloating, nausea, diarrhea, and a mild fever.

Sick after laxative: Depending on which type you might have some bloating and if it worked "too well" some diarrhea. Some of the laxatives have fiber and other ingredients that can cause "fermentation" while waiting to move thru. This will cause bloating. Other laxatives cause a movement of water into the gut causing discomfort and bloating and nausea. It is a little unusual at 20 to have serious constipation.