I just found out i'm pregnant. 4weeks along and i'm addicted to laxatives i take 25mg of bisacodyl a day for 6 years. will this hurt the fetus?

Shouldn't be problem: with the pregnancy per se, but laxative abuse can be part of a larger problem, including eating disorders like anorexia nervosa and bulimia, both of which can cause problems in pregnancy. You need to talk to your PCP and/or OB provider about your laxative use and get help. It can be treated, it isn't rare, and it doesn't make you a bad person. Especially now, when you are expecting, get help!!