Problems going to the bathroom?

so for the past week ive been not been going to the bath room regularly. ive been going about every other day and its been smaller then a regular bowel movement. its a darker brown color too. i went to the doctor and they took blood work and x rays. the blood work was fine. the x rays showed that my bowels were backed up. so the doctor put me on gycolax and told me to take an enema. so i took an enema 2 nights ago. and it kind of worked. it got some little diarrhea out and a few little pebbles of stool. but when it felt like i had a bigger stool coming out i stained and it wouldnt come out. it felt blocked or like my insnt working i guess. i kept trying to push but it just wouldnt come out. so i went back to the doctor and she told me to take ducolax so i took some last night and about 3 hours after taking two tablets orally i had cramps and then diarrhea, with some stool in it. and tonight i took two more and its been 5 hours later and no urge to go to the bathroom.