Suggest Treatment For Lower Abdominal And Back Pain

Hi, my name is Sherwin from the philippines and i m wondering what s causing my lower abdominal and lower back discomfort, it s more of a dull nagging sensation rather than pain. My stools back like 2 weeks ago are long like three quarters of a foot and color is brown. It was all like that when it changes to still like that however it would be loose to the last few drops. There s no indications of bleeding as the color is just normal brown. And that s when I started to have discomforts in my lower abdomen. My anus would have like a burning sensation around it and the feeling seems to further go up there maybe like 6 inches up. The pain seems to traverse to my scrotal area, my butt cheeks would sometimes have a faint pain as well to almost not noticeable. This has stolen away some of my precious sleep time. I have a job that requires me to sit a lot as I m an online teacher, not quite sure if that has something small to do with this. I have been having gerd since time immemorial and I would burp a lot like I can do 10 or more consecutive burps with no problem at all. I also would have high stomach acid associated pain from time to time and would normally resolve with ranitidine. I never watch what I eat but my diet would normally be a little bit more of rice and fried food but would also regularly eat fruits and vegetables. Coffee is my addiction so I think that goes for my having episodes of gerd. So there you go. I hope you can enlighten me on what could be happening. Thanks!