Fecal Impactions ?

Hi, i just need an opinion on what my symtoms may be. Around September to November of 2006 i went through a phase of constipation for no apparant reason. I would be constipated for about 1 week, then be slightly relived for a day, then be constipated again. This continued for those 3 months. After, the constipation stopped, but now all my bowl movements are strange due to the fact that my stool is narrow most of the time, but once in a while it comes out with some sort of bulk. I have increased my fiber and water intake tremendously, however it is not seeming to help. By doing research, ive come up with the possibility that i have a fecal impaction, however i do not fall under some of the sideaffects of a fecal impaction, being that one would feel nauseated and have abdominal pain. I dont have either. I have actually forgotten what its like to have a normal bowel movement Any help would be wonderful