Loc: Northern California
Actually making yourself move around is of benefit to overcoming symptoms. You have indicated in posts (and profile) that you have trouble with complete evacuation. Thus excercise would be very good!
You might try helping out around the house and sitting down between chores, rather than being at the computer most of the day. Obviously, you are able to work at McD's and manage to stand up and do the work assigned to you 5 days a week.
We are here to hopefully encourage and help one another, as needed and asked. Sometimes we say things that another does not want to hear.
Try getting some exercise, such as taking out the garbage and cleaning up the kitchen after you cook or eat, and beyond, to help out your mother and make for better rapport between the two of you.
Doing such will boost your morale, your quality of live, purpose in life, and help you with your IBS-C symptoms.
There are no 'free' rides in life. There is always a payoff somewhere, often self-destructive.