I cant poop! Any one know why?

2 weeks ago I lifted up something kind of heavy. It was a bucket of dirty water that was located on my porch. I live in the 3rd floor so I lifted it up from the 3rd floor all the way down and It must of weight about 55 to 65 Pound's is my guess. When I came back upstairs I was so tired and my legs and arms were shaky and I needed to take a poop so I went to the bathroom and nothing was coming out but like yellowish/ brownish smudge. Ever since then I cant take a proper poop and ive tried a few things already. I drinked prune juice,I tried something called smooth lax. Ive been drinking lots and lots of water.Ive even been jogging a bit to see if something gets loose. I also keep hearing like gurgling sounds in my stomach and I keep feeling like taking a poop but nothing comes out but smudge. Im going to the doctor today but does anyone knows what it might be? or has anyone experienced something like this before?