Severe back and hip pain durning and before bowel movment? and it seems to be getting worse. bowel movment is normal and regular otherwise.

Probably sciatica: It is probably a sciatica, which is an irritation of a nerve in the back that causes pain to run down the leg. Some cases do respond to rest, others need more aggressive treatment before they get better. I would encourage you to be seen at some point if it does not get better. Thank you for the question.

Herniated Disc: Consider the need for a lower back (ls spine) mri. This will go a long way in ruling out a herniated disc, which maybe the reason for your symptoms. Good luck!