When I am unable to give happiness to my parents and family, then bad feelings, aka stress, continue to cloud my mind, so that it seems as if I am thinking about something that is not permissible religiously - that it will be permissible for me, that's how I feel stress has really haunted my soul.

Don't expect so much from yourself, you do what you can, and I'm sure your loved ones appreciate it anyway. If you are so religious, don't worry either, whatever you do, god loves you :)