My mam has ovarian cancer, it's really tough for me to cope : (i feel so upset and angry and i'd just like to know how to cope?

Counseling. Dealing with grief is complicated and difficult. Life often isn't 'fair'. If you need help coping with your mother's cancer, ask your doctor for a referral to a counselor, whether it be a psychiatrist, psychologist, or other professional who deals with these issues.