Hej barry
is there any option u can go outside meditating or do u live in a city? Somewhere in nature where nobody disturbes you. Also beeing in nature is calming itself can help.
and as prabhaker allready said, meditation is a lifestyle. Take your time for everything you do, slow down, bring awareness into your doing.
one thing about your mother. You probably have relativly big aversion while she keep disrupting you. The moment she does, try to bring to your mind that she herself is very agitated and restless in her mind and therefor not rly happy herself. This will help you develop some compassion instead of negativ feelings. Practice that should help.
good luck!