Constipation problems?!?!

Hi, I've been having constipation problems for a bit over 2 months now, and I've tried EVERYTHING I can think of and have researched to try and help, I've have 100% pure fruit juices, I only eat fruits, vegetables, whole grain breads, lots of nuts and I excersize everyday. I have stomache pains after I eat anything unhealthy (e.x, chocolates on valentines day) I don't know what I'm doing wrong or what is wrong with me. The only thing that will make me go is laxatives, but they've even stopped working for me recently, I try not to depend on the them too much because I heard it's very bad for your system but I just can't go any other way! Does anybody have any Ideas as to what this could be or what I can do to relieve this?! any answers will be greatly appreciated! Thank you in advance!